And when it’s time to book your weekend trip to Colorado, consider a vacation rental as your accommodation. Whether you prefer an urban loft, slopeside home, or mountain chalet, TripAdvisor offers a wide variety of different rentals across the state. You’ll be treated to homey amenities such as a full kitchen, laundry, and even perhaps a fireplace and Jacuzzi for those chilly Colorado nights!
Estes Park vacation rentals are always worth considering, but be sure to check the calendar before you book and you could enjoy something even more special. Estes Park hosts a variety of events throughout the year, any of which would make a great addition to your vacation itinerary. For example, in early June, the Estes Park Jazz Fest takes place and features jazz musicians from across the country and beyond.
Durango - very popular for romantic getaways in Colorado during the summer, and for good reason. The gorgeously restored Main Ave combines Victorian-era Hotels and Wild-West Saloons, giving the city a remarkable atmosphere. There's plenty of scenic drives nearby, and the steam-engine narrow gauge rail journey up to Silverton is a wonderful daytrip.

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.
Another one of the state’s most popular skiing and snowboarding destinations, Steamboat Springs may be a winter wonderland during the chillier months of the year, but the summer brings an endless landscape of green dotted with brilliant wildflowers. This is when this Wild West town really comes alive, with visitors enjoying fly fishing, inner tube rides and rafting trips on the Yampa River, endless scenic hiking and mountain biking trails, and natural hot springs that are ideal for soothing sore muscles afterward. If you can be here around late June/early July, you can attend the legendary annual Hot Air Balloon Rodeo and Art in the Park festival which boasts an extensive display of colorful hot air balloons along with some 50 artist vendors, live entertainment, food and drink vendors, and an interactive children’s art area.
A home base for travelers visiting the Rocky Mountain National Park, Estes Park is less than a 2-hour drive from Denver. The park offers 355 miles of hiking trails paired with stunning vistas and landscapes, from snow-capped mountains to picturesque lakes and valleys, where those who crave adventure will find a myriad of outdoor adventures. Estes Park itself is a great area to explore, as visitors can meander the Riverwalk in Downtown Estes Park or hop on the Estes Park Aerial Tramway to the top of a small peak. Estes Park boasts a variety of shopping and dining experiences, while movie enthusiasts will want to stop by the world famous Stanley Hotel that was the inspiration behind Stephen King’s “The Shining.”

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.
Cripple Creek is best known as a historic mining and gambling town, but besides the fun and entertainment of its nine modern casinos, Cripple Creek offers diverse activities for all ages. You can satisfy your lust for adventure with white water rafting, river tubing, rock-climbing, mountain biking and off-road racing or explore the Trails of Gold network of hiking and biking trails through historic sites in the gold camp.

Only a short drive from lively Steamboat Springs, the Aspen View Lodge is tucked away on the edge of the Rabbit Ears Pass recreational area and Routt National Forest. Surrounded by mature aspens, the lodge fits in perfectly with its huge rough-hewn timbers and a wall of glass. The lodge can accommodate 35 guests in 12 contemporary, comfortable bedrooms with all the necessary amenities.
Located 75 minutes west of the Resort along with a five-mile stretch of Colorado’s famed Tarryall River, The Broadmoor Fly Fishing Camp is a private escape that pairs world-class fishing with exceptional accommodations and dining. This outstanding retreat borders 120,000 acres of the Lost Creek Wilderness, offering honeymooners who love to fish together the opportunity to experience more than five miles of private waters under the guidance of professional Broadmoor guides. The picturesque camp features a beautifully restored Main Lodge with a wraparound deck and seven rustic yet well-appointed guest cabins dating back to the 1920s. During the evenings, guests gather in the Main Lodge for artfully prepared meals and relaxation. In addition to the exceptional fly fishing, camp guests can enjoy a variety of fun activities such as horseback riding, hiking, and the opportunity to see some of Colorado’s most spectacular wildlife.
At the Ruby of Crested Butte, your pooch will be treated like an honored guest. With six luxurious rooms all featuring private baths, a hot tub to warm up your bones when you come back from the skiing, a gourmet breakfast with famous hot cinnamon rolls, and a comfy bed for your dog, the Ruby will quickly become your base for the adventures in and around Crested Butte.
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.
“The law is clear: if the federal government is shut down, our National Parks must also be closed to protect public safety and pristine spaces. It is not acceptable to use FLREA (Federal Lands Recreation Enhancement Act) funds to keep the parks open, and the Department of the Interior’s actions likely violate appropriations law,” McCollum said in a statement.

Located in the valley of the Yampa River, Steamboat Springs is world-famous for its fantastic skiing and healing hot springs. With 165 main trails spread across 2,965 acres on the Mount Werner Park Range, Steamboat Ski Resort is one of the largest in the country. Another great winter fun is dog sledding with Grizzle-T Dog Sledding and their Alaskan Huskies.


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
Nicknamed the “Mile High City,” Denver is a haven for outdoor-lovers year-round, making it one of the best weekend getaways in Colorado for any type of travelers. Bring your camera along to capture views of urban and natural scenery alike—Larimer Square and the 16th Street Mall are two essential sightseeing destinations for first-timers, and Mount Elbert is always looming large in the background. The real Denver attraction, though, is the culture, which you can discover on a walk through the city’s distinct neighborhoods, on a Denver sightseeing tour, or a bike and brewery tour (it doesn’t get more Denver than that).
ItineraryThis is a typical itinerary for this productPass By: Fall River Visitor Center, Rocky Mountain National Park, ColoradoEnter into Rocky Mountain National Park for the day of adventureStop At: Alluvial Fan, Rocky Mountain National Park, ColoradoWalk down the trail and take in the fresh air withness the power of destruction along your walk to a waterfall and alluvial fan. See boulders the size of cars deposited onto the valley floorDuration: 35 minutesStop At: Horseshoe Park, Rocky Mountain National Park, ColoradoEnjoy a picnic lunch nestled into a picturesque mountain valley next to a streamDuration: 40 minutesStop At: Trail Ridge Road, Rocky Mountain National Park, ColoradoTravel 11 miles into the Alpine along this scenic drive on the highest paved road in North America stopping to take photos and walk down the overlooks and enjoy the majestic views and wildlife sightings.Duration: 2 hoursStop At: Alpine Visitor Center, Rocky Mountain National Park, ColoradoVisit the Ranger Station and Gift shop or enjoy a walk up to the highest point on Trail Ridge Road taking in the 360 degree breathtaking mountain viewsDuration: 40 minutesStop At: Many Parks Curve Overlook, Rocky Mountain National Park, ColoradoSee the many sides of the park on this short walk with views of Long's Peak and the mountain valleysDuration: 20 minutesPass By: Beaver Meadows Visitor Center, Rocky Mountain National Park, ColoradoExit the park through Beaver Meadows looking for wildlife along the way.Stop At: Downtown Estes Park, Estes Park, ColoradoStroll down Elkhorn Avenue grab a drink or ice-cream and pop into the local shops or visit the historic Stanley Hotel while in this quaint mountain town.Duration: 45 minutes
The Broadmoor Hotel, built in the late 19th-century, offers lots of historic elegance and luxury for honeymooning couples along the shores of Cheyenne Lake at the edge of Colorado Springs. The vast resort offers just about everything you could ever want in a romantic getaway, including the chance to sip cocktails alongside the infinity pool while enjoying spectacular views of the lake and the jagged peaks of the Rockies. There are eight restaurants onsite, a spa, three championship golf courses and a wide range of outdoor activities at your disposal from paddle boating to horseback riding and fly fishing. The property also offers a variety of romantic getaway packages that include things like a romantic dinner for two or sparkling wine and chocolate-covered strawberries at turn-down on your first night.
A gorgeous mountain town that is not as well-known as its counterparts, Salida offers a variety of historic attractions to fill up a weekend itinerary. Take the Monarch Scenic Tram to soak in stunning Rocky Mountain views, go for a dip in the Salida Hot Springs or explore the area’s local history and culture at the nearby Salida Museum. When the weather warms up, grab a kayak or tube and head to the Arkansas River, and active travelers can utilize one of the many scenic mountain bike trails to explore the region further. A certified Colorado Creative District, visitors can also browse the area’s abundance of impressive art studios and galleries.

The unspoiled beauty of Rocky Mountain National Park draws thousands of visitors every year. With over 50 placid lakes and babbling streams, this is a popular fishing destination for both locals and visitors alike. In order to fish within the park, please note that you will need a valid Colorado fishing license. You can trek through over 355 miles of hiking trails or stick to the park roads for a bicycle ride suitable for all ages. After exploring, head to the Visitor Center to learn about the animals and plants you encountered on your hike or bike ride. If someone in your group loves horses, consider visiting the Glacier Creek Stables for the opportunity to see the area on four legs rather than two.
Teachers must help build the foundation for critical thinking and challenge students instead of assigning an overload of material to memorize for 1 test and forever be forgotten. Teachers themselves must be challenged as well to continue their education and modify their teaching based on this ever changing world. Hopefully these new bonus programs and raise in salaries provides satisfaction and it sparks more rigor for the staff in Denver schools.
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]

CURRENT TRAIL CONDITIONS Trails are generally snowpacked and drifted. In general, traction devices and poles are advised. The further from the trailhead, or the less popular the trail, the more snowshoes are needed. If it is windy or there is new snow, tracks can disappear and you could lose your way unless you have good route-finding skills and proper equipment
DENVER (CBS4) – With Valentine’s Day quickly approaching, you may be thinking about a last-minute escape for two. If you don’t have a lot of money to spend, you need not worry, as there are plenty of amazing destinations just a short drive from home that will still feel like you are getting away from town for a few days. The trick to saving money this time of year is to avoid the busy ski resort towns, where the room rates get very high and the towns can be very crowded. Instead opt for off-season at one of the other beautiful summer destinations in Colorado. You’ll find you can get an amazing room with lots of amenities for a much better rate.

The rugged and elevated landscape and disused mining roads provide a challenging playground for mountain biking and off-road vehicles, while fishermen can head to Molas Lake to cast a line. You can go hiking in the San Juan National Forest, take a four wheel drive along the Alpine Loop Scenic Byway, or savor a scenic ride on the Durango & Silverton Rail Road. Things to Do in Silverton
Outdoor adventurers, skiers, nature lovers and history buffs a return to Colorado year after year for memorable vacations surrounded by spectacular scenery. Colorado is famous for its first class ski resorts such as Aspen, Telluride and Crested Butte and elegant cities packed with cultural attractions, including Denver, Boulder, Fort Collins, Colorado Springs and Estes Park. You can get back to nature in the beautiful state parks where you can admire everything from towering sand dunes and waterfalls to gushing white water rapids and historic scenic railways. Here are the best places to visit in Colorado.

Romantic getaways in Colorado combine sequestered mountain retreats with the cowboy spirit of culture-packed cities like Denver. Set beneath the Rocky Mountains, romantic weekend getaways in Colorado offer the opportunity to see one of America's oldest resort towns, Colorado Springs. Whether you're partying at a festival in idyllic Telluride or hiking through the rock formations of the Garden of the Gods, you'll find it hard not to believe you're in paradise when you're on vacation in Colorado.
No trip to Estes Park would be complete without a leisurely drive along the Trail Ridge Road at Rocky Mountain National Park, with its winding scenic views of craggy peaks. Park your vehicle and take a hike through one of the many pine-scented trails bordered by forests and tundra. Keep an eye out for elk and other wildlife as you go! Roosevelt National Forest is another wilderness area worth exploring, Meanwhile, you can enjoy the breathtaking views over the valley on the Estes Park Aerial Tramway, which connects the town to the summit of Prospect Mountain. Down Estes Park has lots of options for one-off shopping and dining, whether you feel like chowing down on a handmade pizza or a juicy elk burger. Afterward, quench your thirst with a pint of Colorado craft beer at one of Estes' local breweries.
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.
Strawberry Creek Cabin is a beautiful log retreat located in Beaver Creek’s most exclusive neighborhood. Take in the dramatic views of Beaver Creek as you cozy up in front of the fireplace in the living room or cook in the gourmet kitchen. The interior features designer decor, comfortable layout, and an amazing art collection. Enjoy the outdoor fire pit and hot tub on the private back patio overlooking the ski runs. Ski-in/ski-out access via the Settler’s Way run is just steps away.
Teachers must help build the foundation for critical thinking and challenge students instead of assigning an overload of material to memorize for 1 test and forever be forgotten. Teachers themselves must be challenged as well to continue their education and modify their teaching based on this ever changing world. Hopefully these new bonus programs and raise in salaries provides satisfaction and it sparks more rigor for the staff in Denver schools.
Head to Denver, Colorado where you can see shows, visit museums and sample new flavors at gourmet restaurants. The Curtis – a DoubleTree by Hilton is a boutique hotel with 336 innovative accommodations, a retro dining experience and a state-of-the-art fitness center. The Bigger Better Deal Rooms offer 350 square feet of living space and views of downtown Denver. There are three types of suites to choose from: a KISS Suite, a Rolling Stones Suite and a suite dedicated to the Spice Girls. Guests can also stay in a “Hyper Themed” room on each of the 13 themed floors, such as the Jimmy Buffett Suite and the Ghostbusters Suite.
Enjoy LUXURY mountain cabins at our resort with outstanding VALUE. "A Home Away from Home Getaway." 1, 2, and 3-bdrm condos available with fully applianced kitchens, living room fireplaces & private decks overlooking Fall River. Private hot tubs & spa suites are also available. Located only 1 mi. to RMNP, 3 mi. to Downtown. FREE: Stocked river fishing, Wi-Fi, local calls, movies, games, indoor & outdoor activities.  Estes Park Condos Details
The Alps Boulder Canyon Inn is an award-winning boutique bed and breakfast in the heart of scenic Boulder Canyon. Offering an unforgettable Boulder experience, the Inn features luxurious accommodations, excellent cuisine, and outstanding service. Surrounding by Boulder's magnificent mountain parks and just a short stroll from downtown Boulder and all its attractions, the Inn is an ideal place for both business and leisure travelers to take advantage of everything the town has to offer.
At one time, Niwot was an important hunting and fishing area for American Indians. A railroad extension followed the arrival of Gold Rush miners, and many of the original buildings are part of Old Town in the National Historic District. Located 9 miles from Niwot, the Boulder Reservoir is a popular spot for swimming, boating, and fishing, and there are extensive trails to hike or bike throughout the area. Book your stay at the tranquil Niwot Inn and Spa, or choose a rural escape, like a fully restored 1890s farmhouse where a creekside bike path connects you to the cottonwood-shaded Pearl Street in Boulder. Enjoy a romantic evening at Colterra Food & Wine or the popular Sugarbeet in nearby Longmont.

It’s always “do not disturb” mode at this quaint adults-only hideaway in Crested Butte that’s strictly 16-plus. Just a few blocks from historic Elk Avenue, Purple Mountain Bed & Breakfast has six plush rooms, an onsite day spa and an outdoor hot tub. In the winter, a free shuttle whisks you to Mt. Crested Butte for some of Colorado’s best skiing; when you’re ready for après, retire back to the house for complimentary craft beer on tap and a Ghirardelli hot chocolate bar you won’t have to share with the kids. Happy hour, indeed. Find more B&Bs in Colorado >> 


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.


At 14,115 feet in elevation, Pikes Peak, in Pike National Forest, is one of the Southwest's famous "fourteeners," a reference to mountains that stand over 14,000 feet. The snow-capped peak is easily recognizable from the nearby town of Colorado Springs. This is one of the most visited mountains in the world, second only to Mt. Fuji. Unlike many mountain peaks that are inaccessible to the average person, you can drive to the summit of Pikes Peak on the Pikes Peak Highway, off highway 24, west of Colorado Springs. Travel time is about 1.5 hours. Alternatively, you can take the Pikes Peak Cog Railway for a scenic 8.9-mile trip, with a round-trip time of just over three hours.
In the summer, the Durango & Silverton Narrow Gage Railway is one of the town's main tourist attractions. This historic train runs day trips up the valley from Durango to the old mining town of Silverton, high in the mountains. Durango is also the terminus of the Colorado Trail, a 500-mile-long backcountry trail that runs from Denver to Durango. You can do a day hike or mountain bike along the trail, going out and back the same way. The trail follows the scenic Junction Creek and then climbs up to Gudy's Rest, where many people enjoy lunch and then turn around. In the town of Durango and in the surrounding mountains are numerous hiking and mountain biking trails.
Lulu City, Dutchtown, and Gaskill in the Never Summer Mountains were established in the 1870s when prospectors came in search of gold and silver.[19] The boom ended by 1883 with miners deserting their claims.[20] The railroad reached Lyons, Colorado in 1881 and the Big Thompson Canyon Road—a section of U.S. Route 34 from Loveland to Estes Park—was completed in 1904.[21] The 1920s saw a boom in building lodges and roads in the park, culminating with the construction of Trail Ridge Road to Fall River Pass between 1929 and 1932, then to Grand Lake by 1938.[22]

Nestling in the heart of a former volcanic caldera in the San Juan Mountains, the little Colorado town of Creede will blow you away with its amazing natural splendor and small-town atmosphere. You can learn about Creede’s mining history at the Creede Historical Museum and the Underground Mining Museum and enjoy the annual summer Creede Repertory Festival.


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.
Alta Lakes is a pristine and secluded wilderness setting situated 30 minutes outside the charming mountain town of Telluride, Colorado.  The Observatory is nestled underneath the 13,000-foot peaks of the San Juan Mountains – it is one of only a few homes in the United States at 11,000+ feet! The backcountry cabin with charming rugged details serves as the perfect romantic mountain getaway for couples.
Located in Lions Gate Drive in Winter Park, Winter Park Chateau is a boutique Victorian-style bed and breakfast ideally placed, as it allows visitors to easily explore the surrounding area. The Chateau offers well appointed, comfortable accommodation in the form of eight guest rooms, which feature king, queen, or double beds, designer décor, private bathrooms, and amenities such as flat-screen televisions and wireless Internet. Some of the rooms have fireplaces, jetted spa baths and private balconies with stunning views.
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.

The history of Rocky Mountain National Park began when Paleo-Indians traveled along what is now Trail Ridge Road to hunt and forage for food.[11][12] Ute and Arapaho people subsequently hunted and camped in the area.[13][14] In 1820, the Long Expedition, led by Stephen H. Long for whom Longs Peak was named, approached the Rockies via the Platte River.[15][16] Settlers began arriving in the mid-1800s,[17] displacing the Native Americans who mostly left the area voluntarily by 1860,[18] while others were removed to reservations by 1878.[14]
Precambrian metamorphic rock formed the core of the North American continent during the Precambrian eon 4.5–1 billion years ago. During the Paleozoic era, western North America was submerged beneath a shallow sea, with a seabed composed of limestone and dolomite deposits many kilometers thick.[54] Pikes Peak granite formed during the late Precambrian eon, continuing well into the Paleozoic era, when mass quantities of molten rock flowed, amalgamated, and formed the continents about 1 billion–300 million years ago. Concurrently, in the period from 500–300 million years ago, the region began to sink while lime and mud sediments were deposited in the vacated space. Eroded granite produced sand particles that formed strata—layers of sediment—in the sinking basin.[55]
You can get maps and info at the Estes Park Visitors Center and catch a free shuttle bus to most main attractions. Intrepid adventurers will find an almost endless list of outdoor activities to try, including mountaineering on Longs Peak, thrilling white water rafting, hiking, biking, backpacking, skiing and snowshoeing. Less daring visitors can enjoy the River Walk, take a scenic drive, play a round of golf, or do some wildlife watching. Things to Do in Estes Park 

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.
The park contains a network of trails that range from easy, paved paths suitable for all visitors including those with disabilities, to strenuous mountain trails for experienced, conditioned hikers as well as off-trail routes for backcountry hikes. Most trails are for summer use only, since at other times of the year many trails are not safe due to weather conditions.[82] The park provides dozens of designated backcountry campsites and horseback riding is permitted on most trails.[83] Llamas and other pack animals are also allowed on most of the trails.[84]

Ouray is one of the many historic Colorado mining towns that have re-invented themselves as outdoor playgrounds for adventure sport fanatics. The town is steeped in history, which you can explore at the Ouray County Historical Museum, the Ouray Alchemist Pharmaceutical Museum or on a tour of the Old Hundred Mine, before visiting one of the natural thermal pools that have been attracting visitors for over 100 years.


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.
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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