If you make the quick jaunt to Denver’s neighbor-to-the-north, start with the Fort Collins Museum of Discovery.  Debuting in November 2012, the museum features over interactive 100 exhibits and activities such as the Music & Sound Lab, where physics, technology, history and hands-on playing and composing lead to inspiration.  The Environmental Learning Center is a 212-acre site comprised of four distinct ecosystems – wetlands, riparian, cottonwood forest and prairie – and offers plenty of programs for kids. The Rocky Mountain Raptor Program takes in injured birds of prey, and welcomes visitors interested in their rehabilitation and release. Want a free ride? The Fort Collins Bike Library loans bicycles to visitors and residents, from one hour to seven days, at no charge.
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 riparian ecosystem runs through the montane, subalpine, and alpine tundra zones and creates a foundation for life, especially for species that thrive next to streams, rivers, and lakes.[74] The headwaters of the Colorado River, which provides water to many of the southwestern states, are located on the west side of the park. The Fall River, Cache la Poudre River and Big Thompson Rivers are located on the east side of the park. Just like the other ecosystems in the park, the riparian zone is affected by the climatic variables of temperature, precipitation, and elevation. Generally, riparian zones in valleys will have cooler temperatures than communities located on slopes and ridge tops. Depending on elevation, a riparian zone may have more or less precipitation than other riparian zones in the park, with the difference creating a shift in the types of plants and animals found in a specific zone.[75]
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]
Brian and I descended back to ~7,000 feet for dinner in a small-town Indian restaurant in Nederland, Colorado, west of Boulder. By then, both our heads ached like a bad hangover, and my lungs literally burned when I tried to inhale anything but shallow breaths. Add generalized joint pain, and I had a full-blown case of altitude sickness. Given that I am a noted hypochondriac, I expected the worst.
Denver is the capital of Colorado and it perfectly reflects the diversity of the state, offering visitors of all ages virtually unlimited attractions to suit all interests. You can visit several art museums, including the Denver Art Museum and the Museum of Contemporary Art Denver, and there are several art districts filled with galleries to thrill and delight all art lovers.
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 

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.
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. 
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