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]

Although there are a limited number of dining establishments inside Rocky Mountain National Park, nearby Estes Park offers 70-some restaurants, which serve up a range of cuisines. You'll find a handful of fine dining establishments, including the traveler-favorite Twin Owls Steakhouse, but most of its restaurants are casual yet tasty spots. To refuel after a long day on park trails, travelers should head to Elkhorn Avenue in Estes Park for just about any kind of cuisine. For instance, Antonio's Real New York Pizza & Deli is a great spot to dine in or takeout, Nepal's Café is a prime place to fill up on Indian-Nepalese dishes, while Peppers Mexican Grill is beloved for its buffalo nachos. 
Fort Collins is just an hour north of Denver, but it offers a ton of fun outdoor things to do when you want to take advantage of the sunshine. Just minutes from downtown is Horsetooth Mountain Open Space, a 2,711-acre park with 29 miles of biking, hiking, and horseback trails just west of Horsetooth Reservoir, which happens to be an ideal spot for paddling out in a canoe or kayak. Mountain Whitewater offers whitewater rafting trips on Cache La Poudre River, which flows right through downtown, while the Farm at Lee Martinez Park is an educational zoo that has animals for feeding and cuddling up with, pony rides, hayrides, and interactive adventures. Beer lovers can tour and taste at a number of outstanding area breweries, or even take a Beer & Bike tour where you can enjoy a variety of beers after a hard day of pedaling.

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.

_{This charming cabin is found in Nederland, Colorado, right in the thick of the wilderness. This spacious cabin will give newlyweds the perfect setting to begin the start of married life with the comfort of high-end amenities and gorgeous views of the great outdoors from the comfort of an incredible accommodation. With all the amenities and facilities you would need for a home, a full kitchen, queen sized bed, full entertainment system, and a BBQ, couples will love their escape to this rental. This cabin is nestled into the Rocky Mountains, providing couples with a lot of new adventures to embark on.}
^  This article incorporates public domain material from the Library of Congress document: "Majestic view from the old, one-way, dirt Fall River Road in Rocky Mountain National Park in the Front Range of the spectacular and high Rockies in north-central Colorado". Library of Congress - Prints & Photographs Online Catalog. Retrieved October 28, 2016.
The Experience: Located in a Western ghost town in the Rockies, Dunton Hot Springs is the rustic escape for families that want to experience the great outdoors without compromising luxury or comfort. Dunton offers perma-tents, tepees, and cabins for lodging. This remote destination hotel will get you off the beaten path and out of your comfort zone in the best, most luxurious way possible.
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.
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!
Our last (but definitely not least!) romantic hotel in Colorado is the Leroux Creek Inn & Vineyards. This secluded B&B is surrounded by vineyards and the valleys and mesas of the Grand Mesa located on 54 acres.  Sip their wine while gazing from the Leroux Creek Inn’s flower-bedecked patio onto their vineyards. Near the small town of Hotchkiss, the acreage also includes a creek, dry arroyos, grass pastures, sagebrush, and trees.
Surrounded on three sides by Rocky Mountain National Park, Grand Lake is aptly known as the “Western Gateway” to the Rockies. Because of its close proximity to the wilderness, it’s one of the best weekend getaways in Colorado for an itinerary full of adventure. Strap on your cross-country skis or rent a snowmobile to explore the area’s large network of trails no matter the weather. For indoor entertainment, head to the Rocky Mountain Repertory Theatre, which puts on professional shows loved by kids and parents alike.
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.