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]
Other interesting summer activities include guided tours of Chimney Rock National Monument, hot air balloon adventures and paddling, tubing or rafting along the San Juan River. In winter you can go dog-sledding, cross-country skiing, snow tubing and more at the Wolf Creek Ski Area, enjoy some brewery-hopping or simply relax in the natural Pagosa Hot Springs. Things to Do in Pagosa Springs
SouthwestOuray has been a special destination of world travelers for more than 100 years. This small intimate community is nestled in some of the most rugged and towering peaks of the Rockies. Set at the narrow head of a valley at 7,792 feet and surrounded on three sides with 13,000 foot snowcapped peaks - Ouray has been eloquently nicknamed the "Switzerland of America."
The park may be accessed through Estes Park or via the western entrance at Grand Lake. Trail Ridge Road, also known as U.S. Route 34, connects the eastern and western sides of the park.[91] The park has a total of five visitor centers. The Alpine Visitor Center is located in the tundra environment along Trail Ridge Road, while Beaver Meadows and Fall River are both near Estes Park, with Kawuneeche in the Grand Lake area, and the Moraine Park Discovery Center near the Beaver Meadows entrance and visitor center.[9]
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.
Rising from 7,800 feet to 12,000 – even 14,000 feet in some places – RMNP is a high-elevation park and if you don't give yourself time to adjust to the thinner atmosphere and lower oxygen levels, you could run the risk of getting the headaches, nausea and disorientation characteristic of altitude sickness. Along with taking a day or so to acclimate to the high altitude, you should make sure to consume plenty of water and food to ward off symptoms.

Summer is the busy season in Rocky Mountain National Park, with the most popular activities being hiking, wildlife viewing, camping, fishing, horseback riding, climbing, and bouldering. Winter in the park holds its own unique beauty and attractions. Many of the roads are open year-round, although closures may occur due to weather conditions. People often come here at this time of year to snowshoe or cross-country ski, and ranger-led tours are offered in both of these sports.


Buena Vista is an historic mining and railroad town that resoundingly lives up to its Spanish name meaning “good views” – you are surrounded by towering mountain peaks that provide a wonderful year-round playground for adventure seekers. The area boasts some of the best river rafting adventures in the country and you can also go hiking, biking, horseback riding, fishing and zip-lining.
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.
Dream Lake is one of the most-photographed lakes and is also noted for its winter snowshoeing. Emerald Lake is located directly below the saddle between Hallett Peak and Flattop Mountain, only a short hike beyond Dream Lake.[44] The shore of Lake Haiyaha (a Native American word for "big rocks") is surrounded by boulders along with ancient, twisted and picturesque pine trees growing out of rock crevices. Nymph Lake is named for the yellow lily, Nymphaea polysepala, on its surface. Lake Helene is at the head of Odessa Gorge, east of Notchtop Mountain. Two Rivers Lake is found along the hike to Odessa Lake from Bear Lake, and has one backcountry campsite. The Cub Lake trail passes Big Thompson River, flowery meadows, and stands of pine and aspen trees. Ice and deep snow are present during the winter, requiring the use of skis or snowshoes.[44]
A former Victorian era mining town in the Rocky Mountains, Telluride is a charming town located in a box canyon at the base of a popular ski-and-golf resort. Some of the town’s major attractions include the historic district, which is home to landmarks like the Telluride Historical Museum and the Sheridan Opera House. Telluride is also the site of famous festivals like the Telluride Film Festival and the Telluride Bluegrass Festival.
Beginning in Durango, the San Juan Skyway Scenic Byway is a complete loop that will take you up to Silverton, along the Million Dollar Highway to Ouray, over to Placerville, south to Telluride, Dolores, Mancos, and back to Durango. If you have less time or are only planning on heading in one direction, you can do the Silverton to Ouray section beginning from Durango, up to Silverton, over the Million Dollar Highway to Ouray, and beyond to Montrose or further north to Grand Junction.

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.

Rocky Mountain National ParkAt the edge of Rocky Mountain National Park, Grand Lake is the deepest natural lake in Colorado, dipping to 265 feet. Fed by high mountain runoff, the lake is clear and pristine. In the summer, you can rent a boat, bring your own or simply enjoy the gentle lapping of the waves from the sandy shore. Grand Lake connects with Shadow Mountain Lake via a canal, and just down the road is Lake Granby, the second largest body of water in Colorado.
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]
If you’re interested in visiting the iconic archaeological sites in Mesa Verde National Park, a trip to Durango is in order. This southwestern Colorado city is the closest town to the Puebloan cliff dwellings, and even offers convenient day trips for travelers who are strapped for time. While you’re in town, take the Million Dollar Highway through the San Juan National Forest for some of the best views in the region.
Nestled just one mile from the south entrance of Rocky Mountain National Park and two miles from downtown Estes Park, Rockmount Cottages is a 20 cabin resort covering 15 acres of wilderness. On the grounds, you’ll have access to a half mile of the Big Thompson River available for fishing and riverside picnics. To fit the lodge lifestyle, each cabin is constructed of knotty pine and most include cozy, stone fireplaces as well as furnished kitchens, a 40-inch flatscreen and DirecTV, wireless internet, and outdoor charcoal grills and picnic areas.
In winter you can try cross-country skiing and snowmobile trails and after an energetic day out there is nothing better than a soak in one of the natural thermal springs. You can visit the Buena Vista Heritage Museum or go on a Ghost Town adventure, visit several working art studios and galleries, or quench your thirst at a local brewery. Things to Do in Buena Vista
Glacial geology in Rocky Mountain National Park can be seen from the mountain peaks to the valley floors. Ice is a powerful sculptor of this natural environment and large masses of moving ice are the most powerful tools. Telltale marks of giant glaciers can be seen all throughout the park. Streams and glaciations during the Quaternary period cut through the older sediment, creating mesa tops and alluvial plains, and revealing the present Rocky Mountains.[61] The glaciation removed as much as 5,000 feet (1,500 m) of sedimentary rocks from earlier inland sea deposits. This erosion exposed the basement rock of the Ancestral Rockies. Evidence of the uplifting and erosion can be found on the way to Rocky Mountain National Park in the hogbacks of the Front Range foothills.[60] Many sedimentary rocks from the Paleozoic and Mesozoic eras exist in the basins surrounding the park.[62]
Popular during both the winter and the summer, Crested Butte offers year-round activities that appeal to outdoor enthusiasts. Soak in the crisp mountain air after taking the Silver Queen lift up to 11,875 feet up to see Crested Butte from above, visit the pedestrian-friendly city center with its myriad of locally owned shops, or choose your pick between summer and fall mountain biking and the area’s numerous trails. Those with little ones can head to the Trailhead Children’s Museum, Crested Butte Mountain Heritage Museum or find swimming and hiking at Meridian Lake in the summer.
The perfect blend of a picturesque main street with 2,358 acres of incredible skiing opportunities, Breckenridge is the oldest and largest town in Colorado’s famous Summit County. Take a tour of the 12-block downtown area and window shop through its quaint Main Street shops before strapping up your boots and heading to the famous Breckenridge Ski Resort. In the summer, take the ski ride lift up to find an array of hiking trails, while biking and golf are also popular activities. Host to numerous arts events throughout the year, this Certified Colorado Creative District has exciting public art spaces throughout the area in addition to a National Repertory Orchestra and Backstage Theatre.
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.
The Big Meadows area with its grasses and wildflowers can be reached via the Onahu, Tonahutu, or Green Mountain trail. Other scenic areas include Long Meadows and the Kawuneeche Valley (Coyote Valley) of the upper Colorado River which is a good place for birdwatching, as well as snowshoeing and cross-country skiing in winter. The valley trail loops through Kawuneeche Valley[36] which contained as many as 39 mines, though less than 20 of those have archived records and archeological remains.[37] LuLu City is the site of an abandoned silver mining town of the early 1880s located along the Colorado River Trail.[5] According to a 1985 report prepared for the NRHP, there were only three cabin ruins remaining along with remnants of six other buildings.[38]

The Stanley Hotel is a luxurious hotel in the heart of Estes Park in Colorado that combines a particular style and sophistication with rich colonial charm. Featuring deluxe resort lodging, an exclusive day spa and wellness center, and an array of adventures and activities for the whole family, this hotel is the ideal place for a year-round mountain vacation. Guests can choose from deluxe rooms and suites at the main hotel or accommodations next door at the newly remodeled 40-room boutique hotel called The Lodge.
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.
A spectacular scenic drive stretches from the old mining town of Silverton, to the town of Ouray, along what is called the Million Dollar Highway. This is a 46-kilometer two-lane highway that hugs the mountainside in places and looks out over jaw-dropping cliffs and across valleys to inspiring mountain peaks. It is one of the most spectacular mountain drives in Colorado. If you have time, you can extend this into a longer route and drive the San Juan Skyway Scenic Byway. The Skyway is a full-day trip that you will want to do in good weather, but can be done in winter or summer.
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