Take in the beautiful scenery of Colorado's Front Range, the gateway to Rocky Mountain National Park, as you zip through the trees! Just a 30-minute drive from downtown Denver lie three of Colorado’s longest zipline tracks. 6-line Zipline: Enjoy 4 hours of fresh air, scenic views and thrills on the 6-line zipline in the Rocky Mountains. Ride on six lines that range from 850 feet (259 m) to 1,900 feet (579 m). Soar through the treetops and experience three of Colorado’s longest ziplines! There is a 10-minute uphill hike between the first and second zipline and minimal walking between the others; above-average physical condition is recommended.

Thanks to a wide variety of things to do and places to see, Boulder is arguably one of the best weekend getaways in Colorado—if not the whole Western United States! This college town (home to University of Colorado Boulder) has it all: hike the Flatirons or Chautauqua Park in the morning, tour the Celestial Seasonings Tea Factory and Leanin’ Tree gallery in the afternoon, and then head to Pearl Street for shopping, drinking, and dining at night—and get around on the Boulder Creek Path in between. A Boulder bike tour helps you fit in even more sightseeing, perfect for a quick itinerary.


The Western Slope has plenty of charms, including being a dinosaur mecca with plenty of hands-on science, and is the heart of Colorado’s agricultural region. At the Museum of Western Colorado’s Dinosaur Journey, visitors can get up close and personal with dinosaur skeletons, a working paleontology lab and realistic robotic dinosaurs. Dedicated to “putting science in the hands of kids,” the Western Colorado Math and Science Center features interactive exhibits in biology, physics, earth and space science, and electronics. From June through October, orchards are laden with some of the sweetest harvests around: cherries, grapes, apples, plums, pears, apricots and peaches. Take an orchard tour or check out the myriad of roadside stands selling fresh produce, jams and ciders. For great biking or strolling, the Colorado Riverfront Trail winds for more than 18 miles through the city of Grand Junction’s picnic grounds, botanical garden, protected wetlands and fishing pier. Buy one/get one free passes are available for six major attractions from the Grand Junction Visitors Center. This “Map to Adventure” includes Dinosaur Journey, Museum of the West, Cross Orchards, the John McConnell Math & Science Center, The Art Center and the Western Colorado Botanical Gardens.
Loveland, dubbed as the ‘Sweetheart City’ and known nationwide for its Valentine’s Day Love Stamp Program, is near the college town of Fort Collins in northern Colorado. Rent a charmingly restored 1903 Victorian cottage for your love nest, or snuggle together in a neighborhood home just minutes from hiking in the Rocky Mountain National Park. A visit to the Sweetheart City Winery is a great opportunity to sample some local wines while checking out original oil paintings inspired by a trip to Tuscany. Voted by locals as one of the most romantic places in Loveland, South Shore Parkway is certain to aid in a stolen kiss or two. Sample small plates and incredible desserts at Door 222 Food and Drink, a downtown gem not to be missed.
Visitors come from far reaches to travel America’s highest continuous paved highway. Not for the queasy and open only between Memorial Day — pending the towering walls of winter snow have melted — and Labor Day, two-lane Trail Ridge Road takes explorers across the Continental Divide, past weathered tundra overlooking sweeping valleys and into the clouds at 12,183 feet. The ribbon of a road covers the 46-mile stretch between Estes Park on the park’s east side and the marine town of Grand Lake at the park’s western entrance. There Peak to Peak Highway is another byway near the park, starting in Estes and going through Nederland, Black Hawk and Central City.
Experience the high country the old fashioned way — atop a horse. This is a wonderful way for older children to see more alpine country than possible on foot. There are two stables located within the park: Glacier Creek Stables and Moraine Park Stables. Approximately 260 miles of trails are open to horse use, which makes up more than 70 percent of the total trail network in the park.
Situated in Southern Colorado, the Great Sand Dunes National Park is an impressive sight. Shaped by winds blowing from and against the nearby Sangre de Cristo Mountains, the piles of sand climb to more than 750 feet (230 meters), making them the tallest dunes in North America. Sand-boarding, skiing and sledding on the dunes are the park’s most popular activities, and there are medium-size slopes to slide on located near the main parking area. A longer hike to the north brings thrill seekers to a 300-foot (90 meter) slope that tumbles onto into Medano Creek.
Vail is one of the world’s most popular ski resort towns, but in the warmer months of the year, it draws visitors who come to mountain bike, hike, golf and ride whitewater rapids. Throughout the season, there are an abundance of music and dance festivals, including the Bravo! Vail Valley Music Festival which features orchestras like the New York Philharmonic that performs at the outdoor Gerald R. Ford Amphitheater, as well as the Vail International Dance Festival and the Vail Jazz Festival. Just a few of the other highlights include botanical tours through the Betty Ford Alpine Gardens, rock climbing excursions in Vail Valley and the wealth of shops, bars and eateries in the village of Vail itself.

With breathtaking mountain scenery everywhere you look, even the journey to your Estes Park cabin rental will be enjoyable. The main airport in the area is Denver International Airport, which lies about 75 miles southeast of Estes Park. At the airport, you have access to nearly a dozen different car rental companies and will be able to find the perfect vehicle for your drive to Estes Park. Several highways take you to the town, including U.S. Routes 34 and 36 and State Highway 7.
Colorado Springs stands out from its mountainous counterparts because it's not a ski destination. But what the city lacks in slopes it more than makes up for in incredible hiking opportunities. Mix that in with a good helping of small-town charm and a diverse array of attractions (including the U.S. Olympic Training Center) and Colorado Springs has all the makings of a great vacation. Read More »

Get away and enjoy the surrounding beauty and frequent wildlife visits right from your cabin. Only 3 mi. from Estes Park, our quiet piece of paradise is set on 15 acres of pines & aspen next to RMNP. Full kitchen, living room, and fireplace in all cabins for evening relaxation. Private decks and gas grills.  Some w/private hot tubs.  Valhalla Resort Details


An excellent vacation destination for visitors who are ready to hit the slopes, winter enthusiasts flock to Telluride every year for its 1,700 skiable acres that cater to both experts and novices alike. Visitors flock to Town Park on the southeast edge of town for its abundance of activities available, such as swimming pools, tennis courts, fishing ponds and campgrounds that are popular for the city’s annual festivals and events. Bear Creek Falls and Bridal Veil Falls offer a variety of scenic hiking trails, while the Telluride Historical Museum and Historic Sheridan Opera House are two cultural attractions that shouldn’t be overlooked.
A romantic weekend at the Castle Marne Bed and Breakfast on Capitol Hill in Denver will transport you to more elegant and romantic times with its nine magnificent rooms accented by antique Victorian furniture, fine décor, canopy beds, and fluttering curtains. Of course, they all have modern bathrooms with whirlpool or claw foot bathtubs and other contemporary amenities you simply cannot do without.

Colorado is a year-round destination that piques the imagination and inspires the soul with its dramatic landscape and natural beauty. The state is nothing less than stunning, with a diversity that ranges from the majestic Rocky Mountains to the rolling hills, rivers, streams, and high desert of the Colorado Plateau. Mountain towns beckon skiers, hikers, climbers, mountain bikers, and outdoor enthusiasts of all types, but are also great places to soak up some tranquility and enjoy the mountain vibe. Scenic drives through parks and along state highways are some of the best ways to see the amazing sites that the state has to offer. Remnants of the cultures that inhabited the area and the dinosaurs that once roamed the land can be seen and better understood by visiting some of the national parks and monuments. Colorado is an unbeatable destination that will make you rethink your future travel plans.


Whether you like to ski, hike, or just take in the jaw-dropping mountain scenery with a craft beer in hand, you’ll find the perfect weekend getaway in Colorado. From lively cities like Denver and Boulder, to more laid-back locales like Golden and Pagosa Springs—and plenty of world-class ski resorts in between—we’ve compiled a list of 17 of the best weekend getaways in The Centennial State.
The Gant is one of the best romantic getaways for couples who like the flexibility of staying in a luxury condominium hotel located at the base of Aspen Mountain. The resort has two heated outdoor swimming pools, three hot tubs, five tennis courts, barbecue grills and laundry facilities. Summer activities in Aspen include whitewater rafting, fly fishing, golf, horseback riding, jeep tours, hot air balloon rides, parasailing and mountain biking. In the winter, plan a ski trip, snowboarding, snowshoeing, snowmobiling, sleigh rides, snowcat powder tours and ice skating.
Guests have the freedom to come and go via a keypad code to the house and can enjoy a number of things to see and do in Golden on their own. The Silk Pincushion is within easy walking distance of downtown Golden with a variety of museums, galleries, shops and restaurants to explore. The Golden Gate Canyon National Park and Red Rocks National Park are also close by.
The park was designated a World Biosphere Reserve by the United Nations in 1976 to protect its natural resources.[67][68] The park's biodiversity includes afforestation and reforestation, ecology, inland bodies of water, and mammals, while its ecosystems are managed for nature conservation, environmental education and public recreation purposes.[67] The areas of research and monitoring include ungulate ecology and management, high-altitude revegetation, global change, acid precipitation effects, and aquatic ecology and management.[67]
At 265,000 acres, Rocky Mountain National Park isn't the country's largest national park, nor is it the most-frequented with about 4 million annual visitors (compared to Great Smoky Mountains National Park's more than 11 million visitors). But there is something definitively magical about RMNP, which rises 12,183 feet into the Colorado sky. The main attraction is hiking its 350-some miles of trails that wind through pine and spruce forests, glittering alpine lakes, swaths of wildflowers and if you're lucky, some elk or bighorn sheep. And maybe it's the thinner atmosphere that goes to visitors' heads, but even the most jaded report feelings of awe and wonder after a day or two of breathing in that refreshing mountain air. 

Get away and enjoy the surrounding beauty and frequent wildlife visits right from your cabin. Only 3 mi. from Estes Park, our quiet piece of paradise is set on 15 acres of pines & aspen next to RMNP. Full kitchen, living room, and fireplace in all cabins for evening relaxation. Private decks and gas grills.  Some w/private hot tubs.  Valhalla Resort Details


Say hello to the historical, chic and boutique – The Maven Hotel, just one block from Coors Field, between 18th and 19th Streets on Wazee in LoDo (Lower Downtown). The lobby sets the stage for a lovely stay with its chic boutique feel, and the lobby bar serves up throw-back “speakeasy” style drinks. Playful, modern, hip and just a fun place to stay, don’t miss an opportunity to stay at The Maven.
Guests are treated to a delicious gourmet three-course breakfast every morning along with complimentary bedtime snacks. An intimate library and comfortable lobby offer the perfect place to curl up with a book, an experience that is even nicer when it’s done in front of a crackling fire. The adjacent Rocky Mountain National Park provides a variety of activities from hiking and mountain biking to mountain climbing, fishing, and wildlife watching.
By day, this forested hot spring just north of Steamboat Springs teems with families splashing in the all-natural pools. After dark, it becomes exclusively adults-only — and clothing-optional; don’t be surprised if you spy a cowboy or two taking a dip au naturel. Secluded hillside cabins and train cabooses are within sprinting distance from the pools, for those cooler Colorado nights.
Ready to get romantic?  Stop in and enjoy the Armstrong’s on-site speakeasy-era jazz club,  Ace Gillett’s Lounge, located in the basement of the Armstrong Hotel. An underground shadowy enclave with nearly 100 years of history, order from their signature drink of martinis, wine and local brews, and kick back with your sweetheart in two cozy rooms featuring live jazz music 4 nights a week.
A popular high-altitude town with a bustling downtown scene and a diverse array of activities to choose from, Boulder is a fun place for everyone. It has many great restaurant offerings, in addition to outdoor sports, and is home to the University of Colorado at Boulder. It also has a thriving nightlife, as well as numerous art galleries, shopping, breweries and so much more.
Say hello to the historical, chic and boutique – The Maven Hotel, just one block from Coors Field, between 18th and 19th Streets on Wazee in LoDo (Lower Downtown). The lobby sets the stage for a lovely stay with its chic boutique feel, and the lobby bar serves up throw-back “speakeasy” style drinks. Playful, modern, hip and just a fun place to stay, don’t miss an opportunity to stay at The Maven.
Have a company outing, family reunion or just a bunch of friends that want to get together on the mountain?  E-Tow Cabin is the perfect place for your next outing.  Reserve the E-Tow Cabin and you and your group will have exclusive access to the cabin for the day. Cook lunch on the propane grill, warm up next to the wood burning stove and enjoy the view from the deck with friends and family. Advance reservations are required.  No taxi rides up or down for guests or supplies.  All guests must ride lift up with skis or snowboard.  Not for overnight use. Rental for groups of 10 or more.
Located in Southwestern Colorado, the Gunnison National Park is best known for the narrow gorge called the Black Canyon. With a depth that reaches 2,700 feet (820 meters), the canyon was carved by thousands of years of erosion by the Gunnison River. Scenic overlooks along the 6-mile (10 km) South Rim Road offer views of the canyon. The Cedar Point Nature Trail off South Rim is an easy-to-navigate hiking trail that includes signs about the area’s plants. It leads to a great view of the 2,250 foot (7,380) high Painted Wall, the tallest cliff in the state.
At about 68 million years ago, the Front Range began to rise again due to the Laramide orogeny in the west.[58][59] During the Cenozoic era, block uplift formed the present Rocky Mountains. The geologic composition of Rocky Mountain National Park was also affected by deformation and erosion during that era. The uplift disrupted the older drainage patterns and created the present drainage patterns.[60]
Wildflower-lovers are never disappointed in June and July when the meadows and hillsides are splashed with botanical color. Autumn visitors can relax among the golden aspens or enjoy the rowdier antics of the elk rut during mating season. And those brave enough to venture into the cold during the winter are treated to snowscapes unlike any other, as the park is open year-round.
The nearest airport is Denver International Airport[91] and the closest train station is the Denver Union Station. Estes Park may be reached by rental car, shuttle or RTD bus.[91][98] During peak tourist season, there is free shuttle service within the park and the town of Estes Park provides shuttle service to Estes Park Visitor Center, surrounding campgrounds, and the Rocky Mountain National Park's shuttles.[91]
Morrison is not a very far drive from Denver, but you’ll still feel like you’ve escaped for a special weekend away for two. This bed and breakfast is a beautiful spot to celebrate Valentine’s Day, an anniversary or any special occasion. You’ll love the amazingly breathtaking views from the hot tub suites, with stunning panoramas of the Colorado evergreens covered in snow. Plus, Arrowhead Manor is just a short drive to The Fort restaurant for an incredibly romantic meal. There are also many other fun things to enjoy during your escape for the weekend, as you’ll be close enough to enjoy any of the entertainment options in Denver, or even catch a show at Red Rocks, depending on the season.
Great Sand Dunes National Park- A few hours south from Cañon City will take you to this fascinating and inspiring park. Towering sand dunes as far as the eye can see offer hours of entertainment as you explore the rolling hills, flowing creek (visit in May or June for the best chance to see flowing water), and the visitor’s center. Kids can even earn their Junior Rangers badge! The park has a campground and is a perfect place to get away from the lights, hustle, and bustle of everyday life. That’s what your Colorado Vacation is all about, right? Additional overnight accommodations are located nearby.
Salida is known for its white-water rafting and gorgeous mountain scenery in southeastern Colorado. Nature-lovers, adrenaline-junkies, and ski-bums alike will all enjoy this Colorado weekend getaway. Those who want a mellow weekend trip in Colorado can stroll through downtown galleries and museums, while adventure seekers will find no shortage of heart-thumping excursions.
Another of Colorado's fourteeners, Mount Evans reaches an elevation of 14,271 feet. Almost equally impressive is the Mount Evans Scenic Byway, which extends almost to the summit. This is the highest paved road in the United States, reaching over 14,130 feet. The views from the top and on the way up, above the tree line, are outstanding, with meadows, lakes, and rolling mountains extending out into the distance. The area is so open and exposed that you have a good chance of seeing wildlife, particularly bighorn sheep.
Only a few miles from downtown Denver, Littleton is a historic suburb of Denver with its own charm and history. Its turn-of-the-century houses are witnesses of the rich history while cozy restaurants and bars are inviting and popular. The Main Street has a lineup of independently owned galleries and shops. The Littleton Museum tells the story of the town’s past with its 19th century farm. Town Hall Arts Center presents community-run theater and music events. Littleton has more than 59 parks and two light rail stations with access to Downtown Denver. For outdoor enthusiasts, the Rockies are only half hour away. South Platte Park and Carson Nature Center offer hiking trails and fishing lakes. Pirates Cove Water Park has lap pools, a 35-foot slide, and a tubing river.
The historic Brown Palace, located in downtown Denver first opened its doors in 1892. Since then, the hotel has accommodated celebrities, presidents and other dignitaries. If you are planning to do a lot of sightseeing on your trip, this unique property is conveniently located within walking distance of the pedestrian 16th Street Mall, the State Capitol, the Denver Center for Performing Arts and and Coors Field Baseball Park. The hotel is built around a central atrium; when in the lobby, you can enjoy soaring ceilings and when going to your room, you'll have a view of the classically furnished lobby below on your city vacation.

Escape from the city with a romantic getaway just 30 minutes west of Denver to the Highland Haven Creekside Inn in Evergreen. This family-owned and operated Colorado Mountain B&B will charm you upon the moment of entering the wooded grounds. Their website describes it as an opportunity to create your own “Colorado Woodland Fairytale.” And it is that adorable.  Rustic. Quiet. Charming. And far enough away from it all to feel like a romantic getaway.
The Experience: Denver is the perfect urban adventure for anyone who likes midsize cities. It's easy to navigate and manage and doesn't feel at all claustrophobic, but offers endless cultural excursions, gourmet dining experiences, and a fun nightlife you'd expect from large cities. Make sure you visit the Denver Art Museum, check out the breweries in the RiNo neighborhood, and stay at the Crawford Hotel, which is in the old Denver Union Station. For a boutique hotel, stay at The Maven Hotel.

In the shadow of Great Sand Dunes National Park and Pre­serve, the quirky town of Hooper sits atop a natural artesian hot spring, with water flowing year-round into the family-friendly Sand Dunes Pool. On the same property, The Greenhouse is an all-indoor, all-adult oasis with three small soaking tubs and a 10-by-75-foot zero-entry pool. The Greenhouse also has a 10-person sauna, indoor gardens and an onsite bar to help you stay even toastier. 
Disclaimer: We have attempted to ensure this website is as accurate as possible. However, Excellent Romantic Vacations accepts no responsibility for any loss, injury or inconvenience sustained by anyone resulting from this information. You should verify important information regarding all travel documents, health and safety, customs, and transportation with the appropriate authorities and agents before you travel.

Explore FlipKey's cabin rentals in Estes Park, CO, and find a home-from-home right next to Rocky Mountain National Park. One of America's most-visited national parks, it is home to miles of trails plus wildlife including bears and elk. Don't be surprised if you find the latter casually sauntering through the backyard of your vacation rental! The town of Estes – population 6,300 – is as unique as it is picturesque. Stroll around the downtown area where you can find shops selling everything from Southwestern arts to handcrafted gifts, as well as an eclectic mix of local restaurants.
The charming town of Boulder is surrounded by dramatic scenery, including the amazing Flatirons, acres of forest and snow-capped peaks – a perfect year-round playground. You can soak up the atmosphere on historic Pearl Street before hiking deep into Flatiron territory from the Open Space Mountain Park or meander through the town along Boulder Creek Path.
Located in a quiet, residential alpine setting, guests can spread out and explore the surroundings. Numerous balconies and decks have unobstructed views of the Gore Mountain Range, and the large private back yard with charming stone patio and massive outdoor gas fire pit is perfect for Après-ski gatherings. During warmer months, revel in the beauty and tranquility of the fanciful waterfall feature and perennial gardens, and walk up the mountainside on the fantastic stone switchback trail leading to several stone belvederes, each with increasingly magnificent and unobstructed views of the Vail Valley.

• Drive from Denver to Estes Park into Rocky Mountain National Park.  • On the drive to the park you will pass historic towns and beautiful landscapes from Denver through Boulder, with the option to stop in Lyons for coffee etc. • The hike has beautiful scenery, alpine lakes and diverse trails. The trail is framed with pine and aspen trees, with views of snow capped mountain ranges all around.  • Immerse yourself in the mountains away from it all. • Have a tasty picnic lunch surrounded by serene nature.  • See Colorado’s famous continental divide – rivers and streams west of the divide flow to the Pacific Ocean and east of the divide to the Gulf of Mexico. • This is a approx 4 mile trail (round trip) with about 800 feet in elevation gain. 


Reminiscent of the grand mountain lodges built at the turn of the 20th century, the Wild Horse Inn is handcrafted from 400-year old logs and moss covered rock, and it boasts grandiose windows that look out over the valley. This beautifully rustic inn is the perfect winter escape with luxurious log cabin rooms, crackling fireplaces, en-suite bathrooms with showers and jetted tubs, and private balconies or decks. Guests are treated to a full gourmet breakfast each morning and can enjoy complimentary tea, coffee, hot chocolate, and cookies all day.
Snuggled in a peaceful valley not far from Glenwood Springs, Colorado, Four Mile Creek Bed and Breakfast is located along the picturesque Four Mile Creek just 8.4 miles from the Glenwood Hot Springs Pool. It is surrounded by an expanse of green, natural space perfect for pleasant strolls. There are also plenty of comfortable outdoor sitting areas. A hot breakfast is offered in the morning in the main dining room. In the valley just a short drive away is Sunlight Mountain Resort Ski Area with great skiing in the winter and excellent hiking after the snow melts.

The Experience: Located in a Western ghost town in the Rockies, Dunton Hot Springs is the rustic escape for families that want to experience the great outdoors without compromising luxury or comfort. Dunton offers perma-tents, tepees, and cabins for lodging. This remote destination hotel will get you off the beaten path and out of your comfort zone in the best, most luxurious way possible.

The riparian ecosystem runs through the montane, subalpine, and alpine tundra zones and creates a foundation for life, especially for species that thrive next to streams, rivers, and lakes.[74] The headwaters of the Colorado River, which provides water to many of the southwestern states, are located on the west side of the park. The Fall River, Cache la Poudre River and Big Thompson Rivers are located on the east side of the park. Just like the other ecosystems in the park, the riparian zone is affected by the climatic variables of temperature, precipitation, and elevation. Generally, riparian zones in valleys will have cooler temperatures than communities located on slopes and ridge tops. Depending on elevation, a riparian zone may have more or less precipitation than other riparian zones in the park, with the difference creating a shift in the types of plants and animals found in a specific zone.[75]


The complex interactions of elevation, slope, exposure and regional-scale air masses determine the climate within the park,[48][49] which is noted for its extreme weather patterns.[49] A "collision of air masses" from several directions produces some of the key weather events in the region. When cold arctic air from the north meets warm moist air from the Gulf of Mexico at the Front Range, "intense, very wet snowfalls with total snow depth measured in the feet" accumulate in the park.[48]
The Mummy Range is a short mountain range in the north of the park. The Mummies tend to be gentler and more forested than the other peaks in the park, though some slopes are rugged and heavily glaciated, particularly around Ypsilon Mountain and Mummy Mountain. Bridal Veil Falls is a scenic point and trail accessible from the Cow Creek trailhead, at the Continental Divide Research Center.[41] West Creek Falls and Chasm Falls, near Old Fall River Road, are also in this region. The Alluvial Fan trail leads to a bridge over the river that had been the site of the Lawn Lake Flood.[42]
The Springs Resort - overlooks the San Juan river and is an oasis of relaxation and romance. The resort features 18 different therapeutic mineral soaking pools, full spa services and deluxe accommodations. They've got romance packages perfect for weddings, honeymoons and anniversaries too. And with Wolf Creek Ski Area just a short distance away, this could be a very romantic Colorado winter vacation.
Home to the Lake Superior, Lake Michigan, Lake Huron, and part of Lake Erie, Michigan is rich in natural vegetation and beauty. Families looking for an adventure should explore the Upper Peninsula region that houses famous natural attractions such as the Porcupine Mountains, Pictured Rocks, Mackinac Island, Isle Royale, Tahquamenon Falls, and the Seney National Wildlife Refuge. Then there is the heavenly Lower Peninsula region with its placid lakes, rivers, forests, sand dunes and beaches. Canoeing, fishing, sailing, and motorboating are popular activities. You'll love returning to your Michigan cabin rental to unwind after an action-packed day exploring.

Catering to couples and perfect for honeymoons or weekend getaways, each cabin at Annie’s Mountain Retreat has its own private, outdoor hot tub. Just three miles from Estes Park, three of the buildings are located along the Big Thompson River with water access, and the fourth borders Rocky Mountain National Park with access to hiking trails just steps away!

Non-flowering lichens cling to rocks and soil. Their enclosed algal cells can photosynthesize at any temperature above 32 degrees Fahrenheit (0 °C), and the outer fungal layers can absorb more than their own weight in water. Adaptations for survival amidst drying winds and cold temperatures may make tundra vegetation seem very hardy, but in some respects it remains very fragile. Footsteps can destroy tundra plants and it may take hundreds of years to recover.[73] Mammals that live on the alpine tundra, or visit during the summer season, include bighorn sheep, elk, badgers, pikas, yellow-bellied marmots, and snowshoe hares. Birds include prairie falcons, white-tailed ptarmigans, and common ravens. Flowering plants include mertensia, sky pilot, alpine sunflowers, alpine dwarf columbine, and alpine forget-me-not. Grasses include kobresia, spike trisetum, spreading wheatgrass, and tufted hairgrass.[73]
The Pierre Shale formation was deposited during the Paleogene and Cretaceous periods about 70 million years ago. The region was covered by a deep sea—the Cretaceous Western Interior Seaway—which deposited massive amounts of shale on the seabed. Both the thick stratum of shale and embedded marine life fossils—including ammonites and skeletons of fish and such marine reptiles as mosasaurs, plesiosaurs, and extinct species of sea turtles, along with rare dinosaur and bird remains—were created during this time period. The area now known as Colorado was eventually transformed from being at the bottom of an ocean to dry land again, giving yield to another fossiliferous rock layer known as the Denver Formation.[58]
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