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]
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.
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.
Nature created a perfectly beautiful vacation spot right on Fall River, where you will find our lovely village of 20 cabin suites. They are sprinkled over 17 acres amid the Pine & Aspen with kitchens, fireplaces, decks, grills, Free Wi-Fi, & some private hot tubs overlooking the stocked fishing river. Streamside is perfect for your relaxing river-front getaway. Streamside on Fall River Details
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.
Rocky Mountain National Park is one of the highest national parks in the nation, with elevations from 7,860 to 14,259 feet (2,396 to 4,346 m),[30] the highest point of which is Longs Peak.[31] Trail Ridge Road is the highest paved through-road in the country, with a peak elevation of 12,183 feet (3,713 m).[32] Sixty mountain peaks over 12,000 feet (3,658 m) high provide scenic vistas.[30] On the north side of the park, the Mummy Range contains a number of thirteener peaks, including Hagues Peak, Mummy Mountain, Fairchild Mountain, Ypsilon Mountain, and Mount Chiquita.[33] Several small glaciers and permanent snowfields are found in the high mountain cirques.[34]
Louisville is conveniently situated between Denver and Boulder, offering visitors an attractive weekend getaway destination with a distinctive American small-town feel. You can stroll through the historic Old Town, where several historic buildings now house modern shops, restaurants and businesses. Downtown is also home to the Louisville Art District, which is packed with galleries, studios and hosts a monthly First Friday Art Walk. Live music and theater is popular and you can catch a concert at the Center Stage Theatre Company or the Coal Creek Community Theater. Outdoor activities include walking, hiking, biking and ice skating, while nearby Boulder offers many additional cultural and outdoor attractions.
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.
Rocky Mountain National Park is home to many species of animals, including nearly 70 mammals and almost 300 species of birds. This diversity is due to the park's varying topography, which creates a variety of habitats. However, some species have been extirpated from the park, including the gray wolf, the wolverine, the grizzly bear, and the American bison.
It may be summertime but Snowmass has returned to the Ice Age with the Snowmass Ice Age Discovery Center that features the most significant Ice Age ecosystem find in Colorado history (and it’s free). Touch a mastodon tooth, marvel at a half-sized 6-foot Wooden Mammoth Skeleton, do a dig of your own or a daily Ice Age Discovery Hike by Environment Studies. Visit the Snowmass Rodeo on Wednesday nights (June 12- August 28) and sign up your kids for the Calf Scramble and Mutton Busting. Ride the Elk Camp Gondola up Snowmass Mountain where the Elk Camp Restaurant will open for activities including downhill biking, dinner, campfires, live music, movies, Stryder Park and Kid’s Playground on Friday evenings. Try your hand at some slopeside bowling at the new bowling alley below Venga Venga Cantina featuring eight full-sized lanes, a lounge area with full bar, wood-fired oven pizzas, upscale bar food and more. Then, get inspired at the Anderson Ranch Arts Center, a stellar place for kids of all ages to take workshops that include sculpture, photography, painting, beading, and mask-making.
With elevations ranging from 8,000 feet in the wet, grassy valleys to 14,259 feet at the weather-ravaged top of Longs Peak, a visitor to the park has opportunities for countless breathtaking experiences and adventures. For those wishing to experience the tundra without hiking miles above tree line, the Alpine Visitor’s Center atop Trail Ridge Road is the highest visitor’s center in the entire National Park System!
Located in in southwestern Colorado, Mesa Verde is home to the famous cliff dwellings of the ancient Anasazi people. It is one of the most significant archeological preserve of Native American culture in the US. In the 12th century, the Anasazi start building houses in shallow caves and under rock overhangs along the canyon walls. The most famous of these is Cliff Palace. The Ancient Puebloans constructed it from sandstone bricks, and mortar made from ash, clay and water. It encompassed 150 rooms and 76 open areas. Climatic change and increased population placed the communities under stress and by the late 1270s, the Ancestral Puebloan population began migrating to what is now New Mexico and Arizona. 
Early to mid-summer brings endless fields of wildflowers to the Rocky Mountains, and you'll find plenty of backroads throughout the state where you can take in the view. Take a four-day drive from Denver to Aspen. The route initially heads north through Boulder up to Rocky Mountain National Park. Visit the alpine town of Estes Park and stay in the Stanley Hotel, featured in the movie, "The Shining." You'll see long-forgotten ghost towns, the tallest mountain in the state and more than 200 species of flowers from mid-June through early August. You'll also find scenic backroads in the southern part of the state winding through the San Juan and Sangre de Cristo Mountains.
With its reputation for attracting celebrities and well-heeled travelers, Aspen is one of the world’s most famous ski resorts and one of the best places to visit in Colorado. There’s good reason for the all the hype. Four resorts offer great skiing for every level of skier, from the gentle slopes of Buttermilk Mountain to the ungroomed terrain on Aspen Mountain. During warm weather, visitors can fish for trout from the Roaring Fork River or take shuttles to the nearby 14,000-foot (4,300 meter) peaks of the Maroon Bells to enjoy leisurely hikes around Colorado’s most photographed mountains.
Explore the nearby great outdoors at the Horsetooth Mountain Open Space or get your adrenaline pumping by rafting on Cache La Poudre River with the Mountain Whitewater Descents Company. Visit Global Village Museum of Arts and Cultures to learn about folk art from all over the world. Take the kids to the Farm at Lee Martinez Park to learn about the farm life and play with baby farm animals.
For ice cream and milkshakes, try Flavors of the Rockies, Hayley's or Laura's – all on Elkhorn Avenue and all recommended by recent travelers. To get your caffeine fix, check out Elkhorn Avenue's Kind Coffee and Inkwell & Brew, or Coffee on the Rocks on Moraine Avenue. And to sample a major Colorado food group, travelers can head to Lumpy Ridge Brewing Co. or Estes Park Brewery for a craft beer.
The sun made us lazy, and after following Brian as he made his way upstream I found a wider expanse of sand and gravel, promptly plopping down on a pair of flip flops I had brought in my backpack as a make-shift seat. After identifying the northern harrier hawk over my head, and the savannas sparrows and red-winged blackbirds perched precariously on reeds across the water, I took out my knitting project. I didn’t have to worry about losing Brian; in the valley I could see for miles in both directions.
