Settle into a cozy log cabin on Chicago Creek in Idaho Springs. An iconic historical marker, a water wheel that powered a stamp mill, is visible from US 6 and US 40. Idaho Springs abounds with places to hike, ride, view wildlife, or do some birding. In the winter, take some easy ski runs at the Echo Mountain Resort. Drive up the 14-mile-long Mount Evans road, the highest paved road in America, and enjoy the surrounding landscapes from 14,200 feet above sea level. When it’s time to relax, head over to the geothermal springs and caves at Indian Springs Resort.
Depending on when you choose to stay in an Estes Park vacation rental, you may be able to catch family-friendly events like the annual Teddy Bear Picnic or Longs Peak Scottish-Irish Highland Festival. If you aren't able to make it to those events, don't worry: you can always pick up some local history at the Lula W. Dorsey Museum or Stanley Steam Car Museum. Visit the local shops and galleries like the Wild Spirits Gallery or Alpenglow Images & Accents to see some local photography, woodworking, jewelry, and other crafts or pick up a souvenir or two for friends and family back home.
Rocky Mountain National Park, established in 1915, is a living showcase of the grandeur of the Rocky Mountains. Located outside Estes Park, Colorado, Rocky Mountain is a great family vacation destination, offering outdoor experiences for all—from easy nature hikes around crystal clear mountain lakes to daring rock scrambles up waterfalls and mountains.
Colorado is the perfect destination for an extra-special weekend getaway, especially since it’s home to numerous exciting cities and nature spots. Admire panoramic views of the sweeping, majestic Rocky Mountains, and plan an afternoon hike and picnic. Book a stay at a gorgeous Colorado vacation rental near a historic national park to conveniently enjoy the great outdoors. Here are eight of the most romantic weekend getaway locations in Colorado.
Golden is less than an hour drive from Denver and you’ll love escaping to its stunning views and small-town feel. There are lots of amazing restaurants to check out, some fantastic theater to enjoy and a long street filled with tons of quaint shops, perfect for browsing. Book your room at the Dove Inn Bed and Breakfast and you’ll also have a romantic getaway retreat that is very affordable. You can even add in a special romance package which includes a dozen roses, a box of premium chocolates and sparkling cider for an additional $50. If you want to splurge a little, opt for the Serenity Suite, with an over-sized jet tub for two, cathedral ceilings and, of course, a delicious home-cooked breakfast.
The highest you can hike is Pikes Peak at 14,115 feet, the highest in the Rockies. With so much great climbing opportunities, Colorado Springs is a great place to learn to rock climb. Front Range Climbing Company and First Ascent Mountain School offer classes for any skill level. Rock Ledge Ranch Historic Site offers a glimpse into the past with the 1860 log cabin and the 1880 farm house. Western Museum of Mining & Industry tells the story of the mining in the area and Cheyenne Mountain Zoo offers a home to more than 950 animals, 30 of them endangered.
Dinosaur National Monument is so diverse that the possibilities here extend well beyond the archeological aspects, from a simple driving tour through the monument to hiking, fishing, rafting, and camping. A number of scenic drives run through the park on both paved and four-wheel drive roads. Hiking trails range from short nature walks of less than a half mile to eight-mile-long day hikes. Campgrounds, some of which are open to both tents and RVs and others open only to tents, are spread around the park. It's possible to spend a few days in this area if you are interested in exploring the park.
Apart from elk, many other ungulates reside in the park, including bighorn sheep, moose, and mule deer. Bison were eliminated from the park in the 1800s, as were pronghorn and moose, the latter of which was restored to the area in 1978. Moose are now frequently seen in the park, especially on the park's west side.[77] The park's bighorn sheep population has recovered and is estimated at 350 animals.[78]
^ Montana State University states in their profile of Rocky Mountain National Park that there has been an increase of 2.5 °F (1.4 °C) in the average park temperature over "the past century" (charts show the period from about 1895-2010).[48] The National Park Service site states that the increase has been 3.4 °F (1.9 °C) over "the last century" (chart shows the period from about 1905-2010).[52]
If you wish to have a romantic dinner outside of the hotel or resort you are staying at in Colorado Springs, you have to go to the Pepper Tree Restaurant. Its stylish architecture makes the restaurant one of the most beautiful in Colorado. You can enjoy spectacular views of the city skyline from the restaurant while feasting on a romantic dinner with your love. The restaurant serves high quality seafood, steak,s and legendary wines. Dining at the Pepper Tree Restaurant is a romantic and memorable culinary experience.
Although Aspen is best known as a winter sports destination, this lovely little town in the heart of the White River National Forest is a brilliant year-round destination for active adventurers, festival lovers and arts aficionados. Besides downhill skiing, you can try cross-country skiing, snowshoeing, snowmobiling, ice skating and dog sledding, before rounding off your day with Après-Ski cocktails, local craft beers or a delicious meal.
Just a 5-minute stroll from downtown Estes Park, Fall River Village offers 66 luxury accommodations, including 60 two bedroom and two bathroom condos, a honeymoon suite, four three bedroom and four bathroom townhomes and a four bedroom townhome with panoramic views of the Continental Divide. Property amenities include a heated, outdoor pool, year-round, outdoor hot tubs, a community room, fire pit and grill areas as well as an outdoor recreation area with yard games and a hammock.
There is a reason why this luxury resort is called Garden of the Gods: if the Gods lived in the resort, they would never want to leave because of its breathtaking beauty! This resort features a golf course and full spa. Spend a romantic day getting pampered or walking in the gardens. Later, you can treat yourselves to fine dining at Kissing Camels Grille, where you can enjoy fresh local ingredients used to prepare the superb meals.
Enos Mills, the main figure behind the creation of Rocky Mountain National Park, enjoyed walking to Lily Lake from his nearby cabin. Wildflowers are common in the spring and early summer. In the winter, the trail around the lake is often suitable for walking in boots, or as a short snowshoe or ski. Other lakes in the Wild Basin include Chasm Lake, Snowbank Lake, Lion Lakes 1 and 2, Thunder Lake, Ouzel Lake, Finch Lake, Bluebird Lake, Pear Lake, and Sandbeach Lake. Many of the lakes have backcountry campsites. Waterfalls include Ouzel Falls, Trio Falls, Copeland Falls, and Calypso Cascades.[47]
The ski resort town of Vail is one of the best places to visit in Colorado in winter but it's also a pleasant place to enjoy at any time of year. When it comes to skiing, this is one of the top ski resorts in Colorado, with seemingly endless runs for all levels of skiers. The town at the base of the ski hill is postcard cute, with chalet-style restaurants, shops, and hotels that make you feel like you are in the heart of the Alps. This is a high-end resort with luxury hotels, fine dining, and designer stores.
The Signature Jill's Restaurant has an outdoor terrace with mountain views and serves contemporary American & French cuisine with organic ingredients. The T-Zero Lounge serves signature martinis, cocktails and fine wine. Live entertainment is offered almost every night. If you are celebrating a special occasion, the private dining room can seat up to 25 guests. The terrace can be reserved for private parties in the summer. Room rates start at $249 per night. Things to Do in Boulder
If you’re planning to visit Breckenridge this summer, plan plenty of time to fit it all in. Local fan favorites include fishing or biking the paved trail along the Blue River, a scenic drive over Boreas Pass road accessing 1,000 miles of mountain biking across Summit County, hiking countless miles of trails or climbing a nearby “14er.” The entire family will love the Breckenridge Peak 8 Fun Park’s Gold Runner Coaster, 4X4 off-road tours, climbing wall, Alpine Superslide, hiking tours, Superputt Mini Golf and free scenic gondola rides with spectacular views of Cucumber Gulch. The 2013 Kingdom Days/Outhouse Races June 14-16, 2013 are a must. It’s not every day Outhouse Races, old-fashioned games like potato sack races, magicians, blacksmithing demos, gold panning and historic hikes are the star attractions. http://www.gobreck.com/events/kingdom-days. If you want a date night, drop the kids (ages 5-12) off at the Recreation Center Parents’ Night Out. As your kids, climb, swim and play, they won’t even notice you’re gone.
Below 9,400 feet (2,865 m), temperatures are often moderate, although nighttime temperatures are cool, as is typical of mountain weather.[49] Spring comes to the montane area by early May, when wildflowers begin to bloom. Spring weather is subject to unpredictable changes in temperature and precipitation, with potential for snow along trails through May.[49] In July and August, temperatures are generally in the 70s or 80s °F during the day, and as low as the 40s °F at night.[49] Lower elevations receive rain as most of their summer precipitation.[48]
Located at the foot of Pikes Peak, Colorado Springs draws visitors who come to see the view from the mountain that inspired the writing of the song “America, the Beautiful.” Some hike to the mountain’s 14,115-foot (4,302 meter) summit while others drive or enjoy a ride on the Pikes Peak Cog Railway. With its sculptural sandstone formations and balancing rocks, the Garden of the Gods is another popular natural attraction. This culturally rich city has many museums worth exploring too, including the Fine Arts Center, Pioneer Museum and the Rock Ledge Historic Site, an open-air museum where costumed docents depict life in Colorado Springs throughout its long history.
Located one mile from the main entrance of Rocky Mountain National Park and two miles from Estes Park, Rams Horn Village Resort offers 46 luxury cabins, a heated outdoor swimming pool in the summer, three outdoor, year-round hot tubs, a fitness center and a playground on over seven acres of landscaped grounds. Every amenity at Rams Horn is free to use with your reservation and every cabin will turn into a second home.
One search lets you filter, compare and sort over 12,000,000 available properties from the world’s top vacation rental sites including HomeAway, VRBO, TripAdvisor, Booking.com and more. When you use Tripping.com to plan your trip and book your vacation rental, you never have to wonder if you’re getting the best deal. Find the perfect vacation rental for your next trip to over 190 countries.
Tucked deep in the San Juan Mountains in southwestern Colorado, this carefully restored 19th-century ghost town and natural spa is surprisingly well appointed. The rugged, old-timey building exteriors hide high-end features such as cathedral ceilings, air conditioning, and gas fireplaces. Dolores has four parks and a peaceful bike trail that takes peddlers along the tumultuous Dolores River. You can enjoy hands-on exhibits and a nature hike at the Anasazi Heritage Center, or explore an exact replica of the original narrow-gauge rail car, the Galloping Goose. Share a romantic meal with tasty cocktails at Sophia’s Bistro. 
There’s no need to travel far from Denver unless you really want to. Boulder is less than an hour’s drive away and is home to the luxurious St. Julien Hotel and Spa. One of the state’s most romantic properties, by booking the St. Julien Suite you’ll enjoy an opulent two-room suite with a balcony, deep soaking tub and plenty of room and relax, unwind and enjoy your time together. You can even order up an in-room couples’ massage. When you do want to venture outside of your room, you’ll find lots to do in town and nearby. Hike the scenic trails that skirt its famous Flatirons Mountains, stroll through legendary open-air mall on Pearl Street, and dine at some fabulous restaurants like The Med, with its Greek Island-themed interior, fine wine and sumptuous Mediterranean small plates.
The weather in RMNP is extreme—and unpredictable. Ranging from snowstorms in the winter to hot, clear days in the summer, Rocky Mountain’s got it all. Summer is quick—just July and August—but beautiful, as temperature ranges from 40s at night and up to the 80s during the day. The rest of the year, expect snow at most elevations, and definitely up on Trail Ridge Road.
Brian eventually caught one small trout in the Moraine creek - success! - and many more in the other rivers that flowed through the park, both that afternoon and the next day. We gazed at fellow monoliths from the top of tundra trails, and spooked a red fox along a riverway. All the time, my small knitting project lay safe and secure in my pack, ready to emerge anytime we sat for more than a few moments.
Colorado's biggest city is also its cultural hub. While you can go just about anywhere in Colorado to find outdoor adventures galore, in Denver you get the best of both worlds. The city is filled with top-notch museums, lively sports venues, prime shopping streets and an unmatched brewery scene. Meanwhile, just outside city limits, travelers have easy access to the Rockies as well as the photogenic Mount Evans Scenic Byway. Read More »
You’ll feel really spoiled (especially in Vail!) with complimentary WiFi, complimentary underground valet parking, free breakfast buffet included a surprisingly hefty selection of pastries, breads, fruits, meats, cheeses, cold cereals, and eggs, as well as juice, tea, and coffee. And the outdoor heated swimming pool is worth taking the plunge just for the view.
If you're looking to splurge during ski season, Aspen is the place to be. This small town is conveniently tucked between four renowned ski spots that offer quality slopes for all levels of skiers. Not only that, but the town features the crème de la crème of luxury resorts that whip up an après-ski scene so appealing it'll be pretty tough to leave. Read More »
From luxury condos in major cities, to furnished beach rentals, cozy ski cabins and more, Tripping.com offers the widest variety of unique accommodations for your next trip. Whether you’re seeking a lakefront cabin for a quick getaway, a modern apartment in New York City, or a beachfront property with sunset views in Hawaii, Tripping.com can help you find and book it all.
Crested Butte may be off the beaten path, but it’s worth the trip as one of the most stunning mountain towns in all of Colorado. The atmosphere is one that combines the charms of a historic mining town with hippy flair. Set at the base of the Rockies, it’s world-renowned for skiing, but in the warmer months, it becomes a top hiking and mountain biking destination, as well as drawing countless visitors for the chance to take once-in-a-lifetime whitewater rafting adventures through the Taylor Canyon. A true mecca for mountain bikers, there are hundreds of miles of trails linked together to create an endless day of touring from Gothic to Mt. Crested Butte, Irwin to Gunnison, or even from Crested Butte all the way to Aspen. If you don’t have a bike, stop by Big Al’s Bicycle Heaven and rent one for the day or for the length of your stay. In addition to riding the trails, you can ride around town and check out all the historic buildings and funky alleyways.
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.
Though the Airbnb cabin can accommodate up to 6 people, you can rent it just for the two of you. This vacation rental is located within walking distance to the historic town of Cripple Creek, Colorado. Surrounded by pine and aspen trees, this cabin makes a perfect option for couples who want a romantic getaway. The atmosphere is quiet and peaceful, allowing you to spend quality time together. There is a quite large kitchen for you and partner to prepare romantic dinners. At night, look up to the sky to see the beautiful starry night while holding each other’s hands!
The A.R. Mitchell Museum of Western Art and the many galleries in the creative district are bound to thrill art lovers, while the Southern Colorado Repertory Theater provides live entertainment. Outdoor enthusiasts can go camping, fishing, hiking and boating in the Trinidad Lake State Park, seek dinosaur tracks in the Comanche National Grassland, or go trout fishing on the Purgatoire River.
Observing wildlife is one of the most popular activities in the Rockies. A drive through the park at dusk during the summer is sure to guarantee viewing of herds of elk and mule deer. And throughout the rest of the year, moose, bighorn sheep, black bears, coyotes, cougars, eagles, hawks and scores of smaller animals like pikas and marmots delight wildlife-watchers of all ages.
The town has a lively arts and culture scene, reflected by several galleries and a busy live theater schedule. Outdoors, the fun never stops; you can hike over 70 spectacular trails, have fun on a Jeep, snow-mobile or OHV tour, bike the Ridgway Area Trail System or go rock climbing, canyoneering, fishing, skiing, and hot air ballooning. Keep reading for more Colorado points of interest. Things to Do in Ouray
Surrounded by over 100,000 acres of the Pike National Forest, the Ranch at Emerald Valley is an unmatched, all-inclusive retreat that combines the rustic charm of a wilderness enclave with The Broadmoor’s incomparable luxury and service. Honeymooners can indulge in one of 10 beautifully appointed cabins, featuring gas fireplaces, rich furnishings, and modern amenities. Couples can spend their days fly fishing in pristine mountain lakes, hiking and biking along scenic trails or exploring the mountains on horseback. Afterward, unwind by soaking in an outdoor hot tub and sipping fine wine on a panoramic terrace while enjoying the beauty of a Rocky Mountain sunset. All meals and ranch activities are included as part of the stay, making it an ideal setting for intimate getaways where every detail is thoughtfully handled.
Situated on Vail Square, The Arrabelle sets the standard for luxurious lodging, while its jaw-dropping setting reflects the romantic heritage and ambiance of the European Alps. Here you’ll find architectural touches of Salzburg, Innsbruck and Prague, along with high-end amenities such as personal butler service, ski valet and even grocery delivery. Look forward to heading to the rooftop for laps in the pool and soaking in the whirlpool together while taking in magnificent Rocky Mountain views. You can also relax and unwind together while indulging in treatments at the property’s RockResorts Spa, which offers even more stunning Rockies vistas. Each one of the spacious suites host impressive features like a living room area with a fireplace, ideal for toasting to your new life together while cuddling up next to its warmth.
Rocky Mountain National Park encompasses 265,461 acres (414.78 sq mi; 1,074.28 km2) of federal land,[1] with an additional 253,059 acres (395.40 sq mi; 1,024.09 km2) of U.S. Forest Service wilderness adjoining the park boundaries.[24] The Continental Divide runs generally north–south through the center of the park,[25] with rivers and streams on the western side of the divide flowing toward the Pacific Ocean while those on the eastern side flow toward the Atlantic.[26]
Surrounded by over 100,000 acres of the Pike National Forest, the Ranch at Emerald Valley is an unmatched, all-inclusive retreat that combines the rustic charm of a wilderness enclave with The Broadmoor’s incomparable luxury and service. Honeymooners can indulge in one of 10 beautifully appointed cabins, featuring gas fireplaces, rich furnishings, and modern amenities. Couples can spend their days fly fishing in pristine mountain lakes, hiking and biking along scenic trails or exploring the mountains on horseback. Afterward, unwind by soaking in an outdoor hot tub and sipping fine wine on a panoramic terrace while enjoying the beauty of a Rocky Mountain sunset. All meals and ranch activities are included as part of the stay, making it an ideal setting for intimate getaways where every detail is thoughtfully handled.
The climate change study projects further temperature increases, with greater warming in the summer and higher extreme temperatures by 2050. Due to the increased temperature, there is a projected moderate increase in the rate of water evaporation. Reduced snowfall—perhaps 15% to 30% less than current amounts—and the elimination of surface hail, along with the higher likelihood of intense precipitation events are predicted by 2050. Droughts may be more likely due to increased temperatures, increased evaporation rates, and potential changes in precipitation.[53]
Later in June is the Scandinavian Midsummer Festival, Estes Park's annual celebration of Scandinavian culture. This festival features many Scandinavian and Nordic traditions, such as raising the Maypole, as well as authentic food and drink from the region. There is also dancing, knitting, arts & crafts, and even a reenactment of a Viking camp complete with a Viking ship and sword fight!
Dinosaur National Monument is so diverse that the possibilities here extend well beyond the archeological aspects, from a simple driving tour through the monument to hiking, fishing, rafting, and camping. A number of scenic drives run through the park on both paved and four-wheel drive roads. Hiking trails range from short nature walks of less than a half mile to eight-mile-long day hikes. Campgrounds, some of which are open to both tents and RVs and others open only to tents, are spread around the park. It's possible to spend a few days in this area if you are interested in exploring the park.
With majestic mountains, tundra wildflowers, abundant wildlife, Trail Ridge Road (the highest paved road in the US), and over 350 miles of trails, Rocky Mountain National Park is spectacular! From flat easy hikes around a mountain lake to challenging multiday backpack trips and climbs, Rocky Mountain National Park offers trails for hikers of every level - let us help you plan your adventure! Find the best ways to take in the majesty and serenity of the park. It's YOUR Rocky - explore it!
Following pickup from Denver Union Station, travel by comfortable, air-conditioned coach into the famous Rocky Mountains, or Rockies for short. Your knowledgeable driver delves into the powerful geologic forces that created this stunning mountain range as you drive over Berthoud Pass, 11,314 feet (3,448 meters) above sea level, crossing the Continental Divide. Continue to admire the rugged Rockies as you descend curving, tree-lined roads. You will drive through Winter Park, a small ski resort town on the western slope of the Continental Divide with fun family activities throughout the year. Then you will head to the next town, Grand Lake. Enjoy lunch at an outdoor cafe with fantastic views of the town's namesake, the largest and deepest natural lake in Colorado. Your tour culminates at Rocky Mountain National Park, a 265,000-acre (107,240-hectare) park with 150 lakes and dozens of lofty mountain peaks. Keep your eyes open for elk, bighorn sheep, moose and black bears as you make your way through the park. Drive along Trail Ridge Road, ascending more than 12,000 feet (3,658 meters) above sea level. Along the way, pause at overlooks for incredible photo ops of peaks, valleys and rushing streams. Enjoy more scenic mountain roads on your return journey, and conclude your 10-hour day trip in central Denver.
The Silk Pincushion is a lovely Victorian bed and breakfast in the heart of Golden that promises an unforgettable stay. Three beautifully decorated Victorian-style guest rooms exude luxury and charm with large beds dressed in homemade quilts, private bathrooms with showers, deluxe toiletries and soaps, and other modern amenities such as free wireless Internet throughout the house. Homemade breakfast is served each morning in the bright and sunny dining room, where you can relax over freshly brewed coffee and chat with the owners.
A comfortable reading and DVD library serves as the perfect place to relax with a book and a glass of wine, and there is free high-speed Internet throughout the property. The Wild Horse Inn is surrounded by incredible natural landscapes that offer an array of activities to partake in, from hiking, mountain biking, and climbing to boating, rafting and fishing, and various snow sports in the winter. The inn is located 1 hour and 30 minutes from Denver.
The Fall River Visitor Center just outside Rocky Mountain National Park is the only one open during the government shutdown. It's run by the Rocky Mountain Conservancy, a non-profit that supports the park. That, plus its location outside the park, and the fact that the Rocky Mountain Conservancy leases the private building are why this visitor center can stay open.
“By 1900, the growing national conservation and preservation movement, led by Theodore Roosevelt, Gifford Pinchot, and John Muir, advocated an appreciation for nature. The Estes Park Protective and Improvement Association fostered local conservation efforts. "Those who pull flowers up by the roots will be condemned by all worthy people," they warned. In 1909, Enos Mills, a naturalist, nature guide, and lodge owner, championed the creation of the nation's tenth national park. He hoped that: "In years to come when I am asleep beneath the pines, thousands of families will find rest and hope in this park." Unleashing his diverse talents and inexhaustible energy, he spent several years lecturing across the nation, writing thousands of letters and articles, and lobbying Congress to create a new national park. Most civic leaders supported the idea, as did the Denver Chamber of Commerce and the Colorado Mountain Club. In general, mining, logging, and agricultural interests opposed it. On January 26, 1915, President Woodrow Wilson signed the Rocky Mountain National Park Act.”
A small mining camp not so long ago, Boulder is a modern, sophisticated town at the base of the Flatirons, popular among extreme sports folks and lovers of magnificent nature of all ages. Stroll through the charming downtown with the popular Pearl Street Mall. Discover Boulder’s past at the Boulder History Museum located in the beautiful historic Harbeck-Bergheim House. Boulder Museum of Contemporary Art not only has a range of permanent and temporary exhibits, but also popular educational programs.
Nature lovers can go hiking, white water rafting, horseback riding or climbing in one of the surrounding national parks, or you could choose to explore historic archaeological sites such as Hovenweep, Chaco Canyon and Mesa Verde. The Durango & Silverton Narrow Gauge Railroad is a highlight of any visit and you can combine various adventure sports packages with your scenic train ride. Keep reading for more Colorado points of interest. Things to Do in Durango
Every summer, Aspen gets taken over by classic music lovers during the renowned Aspen Music Festival and School with more than 300 concerts. Learn about Aspen from Dean Weiler during one of his popular Aspen Walking Tours and pay respect to John Denver at the John Denver Sanctuary you will pass by while hiking the picturesque Rio Grande Trail. Next read: best Aspen restaurants.
As of 2010, the preceding one hundred years of records indicated an increase in the average annual temperature of approximately 3 °F (1.7 °C).[48][52][a] The average low temperature has increased more than the average high temperature during the same time period.[48] As a result of the temperature increase, snow is melting from the mountains earlier in the year, leading to drier summers and probably to an earlier, longer fire season.[48] Since the 1990s, mountain pine beetles have reproduced more rapidly and have not died off at their previous mortality rate during the winter months. Consequently, the increased beetle population has led to an increased rate of tree mortality in the park.[53]
The main things to do here are to simply gaze out over the canyon and appreciate the environment or wander along the walking paths and short hiking trails on the rim. These are generally flat and easy trails. If you're adventurous, you can hike into the canyon, but trails are not maintained or marked, conditions are difficult, and you are basically on your own and responsible for the costs of rescue, should the need arise. Three campgrounds are located in the park; the North and South Rim campgrounds are open to tents and RVs but the East Portal is only open to tents.
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]
