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]
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. 
Hands down, Crested Butte is my favorite summer destination in Colorado. In addition to world-famous mountain biking and hiking (the views from Snodgrass Mountain are second-to-none), don’t miss the four-week long Crested Butte Music Festival (with the free Divine Family Young People’s Concert July 13, 20 and Aug. 3) and the Wildflower Festival (July 8-14, 2013) where you’ll swear you climbed onto a Monet canvas of mad, extravagant colors. Last winter, CBMR purchased the Coke Zero Gravity BagJump; a 50 feet by 50 feet bag of air for guests to tube and ski and ride into. Come summer, the resort will be setting up two levels of scaffolding at 10 feet and 20 feet for kids and adults alike to jump into the cloud-like bag of air. The resort will also be building a dirt jump for biking enthusiasts to practice their jumping skills with their bicycles for an added adrenaline rush, as if the 25 miles of trails in the Evolution Bike Park isn’t enough. For younger kids, check-out the Trailhead Children’s Museum and big kids (must weigh at least 70 pounds) can try the Crested Butte Zipline Tour, which includes five zip lines ranging in length from 120 – 400 feet connected by features or “events” such as suspended wood bridges and towering platforms. P.S. A few years ago, my kids did Kids Nature Camp at world-renown Rocky Mountain Biological Laboratory in nearby Gothic, Colo. and still rave about it.
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!
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]
When it’s your turn for some pampering, escape to Smith Fork Ranch in Crawford within the secluded Gunnison National Forest, where romance and relaxation are as big of a priority as adventure. Indulge in sumptuous open-air massages, luxe cabins and candlelight dinners featuring farm-to-table cuisine from the ranch’s organic homestead. During adult weeks in September and October, activities range from archery to fly-fishing, if you’re not too busy taking it easy.
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.
Easily accessible from Estes Park is Rocky Mountain National Park, which boasts over 100 mountain peaks that tower over 11,000 feet above the ground. In this gorgeous park, you will find over 300 hiking trails as well as paths to traverse by car or on horseback. Exploring the park will also bring you into close contact with a variety of wildlife, from striped chipmunks to large elk.
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.
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]
Breckenridge is justifiably famous as one of the best ski resorts in the country, but spending a little time seeking out the off-piste charms of the town can be extremely rewarding. You can explore the thriving arts and culture scene or learn some Breckenridge history on a tour with a local expert – popular choices include the Historic Tour, the Haunted Tour and the Gold Mining Tour. In summer you can go hiking, biking, fishing, paddling and rafting, while in winter everyone heads to the slopes to enjoy world-class winter sport activities and ride the highest ski lift in the country. Things to Do in Breckenridge
Colorado has no shortage of amazing restaurants to inspire warm feelings. You might opt for the latest offering from a local celebrity chef, such as Alex Seidel, of Fruition and Mercantile in Denver, who was voted one of Food and Wine’s best new chefs in 2010; or Jennifer Jasinski of Euclid Hall Bar & Kitchen, who impressed judges in season 5 of "Top Chef Masters" and also won the James Beard Award for Best Chef Southwest in 2013. Or, you might choose a destination restaurant like Ragnar’s in Steamboat Springs, where getting there is half the fun — guests can arrive only via skis, snowboards or snowshoes.
The 179 guest rooms are furnished in a relaxed Rocky Mountain style, featuring overstuffed leather chairs, suede pillows, wool throws, and leather tabletops. For guests who require additional space, the hotel offers two Presidential suites and 11 One-bedroom suites. The Club Floor, accessible by key-activated elevator, provides guests with additional privacy, complimentary food and beverage presentations, and personal concierge service.
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.
Rocky Mountain National Park is an American national park located approximately 76 mi (122 km) northwest of Denver International Airport[4] in north-central Colorado, within the Front Range of the Rocky Mountains. The park is situated between the towns of Estes Park to the east and Grand Lake to the west. The eastern and westerns slopes of the Continental Divide run directly through the center of the park with the headwaters of the Colorado River located in the park's northwestern region.[5] The main features of the park include mountains, alpine lakes and a wide variety of wildlife within various climates and environments, from wooded forests to mountain tundra.
While it is possible to travel through Rocky Mountain National Park and not catch sight of any wildlife, we venture to say that is an unlikely experience. From everyday sightings of chipmunks and mule deer to the moving experience of viewing elk in rut (the mating season), the animals in the park let you know that you are part of something truly wild. Some of these critters are harder to spot than others - they might camouflage themselves in the trees or hide in the underbrush - but look closely and you may have an encounter unlike any other.
