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]
Known as a world-class ski destination, Aspen is beautiful year around and offers activities and attractions for all ages. Skiers can challenge their skills on the magnificent steeps, slopes and glades of Aspen Mountain or Ajax, on rugged Aspen Highlands or enormous Snowmass. Take a 14 minute ride with the Silver Queen Gondola to the top of Ajax Mountain for the spectacular views of the mountain peaks, the city below and tall evergreens all around you. There are bluegrass concerts on Sundays.
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.
^{After an amazing day viewing the natural beauty of Garden of the Gods and Pikes Peak-America’s Mountain, your significant other and you can relax by having a glass of wine and dinner in Old Colorado City. Old Colorado City was founded in 1859 and features old brick structures, quaint alleyways, boutiques, galleries and restaurants with cuisine from all over the world. It makes a perfect setting for a romantic dinner for two.}
The best time to visit Rocky Mountain National Park is from June to September when the snow is (mostly) melted and the hiking trails and attractions are accessible. Still, these four months are also the most popular times to visit, so if you'd rather experience RMNP in relative isolation and while wearing snowshoes or cross-country skis, visit between the months of October and May. Whether snow or sunshine, the park is open to the public 24 hours a day, 365 days a year, though some parts may be inaccessible. 
Garden of the Gods, a registered National Natural Landmark, is a unique landscape of jagged stone towers and fins jutting up 300 feet from the earth, and giant balanced boulders and rock piles dotting the landscape, with distant mountains completing the scene. Fifteen miles of trails, most of which are short and easy, allow you to get up close to the dramatic rock formations and wander through the surreal scenery. The park is a popular area for rock climbing, but other activities in the park include road biking in designated biking lanes, mountain biking, horseback riding, and Jeep and Segway tours.
Nestled below Colorado's radiant mountaintops is beautiful Lazy R Cottages in Estes Park. Just one mile from Rocky Mountain National Park, we offer one-, two- and three-bedroom cabins perfect for romantic escapes and family vacations. Our cabins have kitchens or kitchenettes, fireplaces, decks with mountain views, and some with personal hot tubs … perfect for relaxing after a day enjoying Estes Park and the National Park. Dog-friendly units available ($15 per dog/per night). Free Wi-Fi. View more about our Estes Park cabins.
Estes Park vacation rentals are always worth considering, but be sure to check the calendar before you book and you could enjoy something even more special. Estes Park hosts a variety of events throughout the year, any of which would make a great addition to your vacation itinerary. For example, in early June, the Estes Park Jazz Fest takes place and features jazz musicians from across the country and beyond.
Estes Park vacation rentals are always worth considering, but be sure to check the calendar before you book and you could enjoy something even more special. Estes Park hosts a variety of events throughout the year, any of which would make a great addition to your vacation itinerary. For example, in early June, the Estes Park Jazz Fest takes place and features jazz musicians from across the country and beyond.

There are multiple scenic trails to hike and challenging cycling paths to discover as well as many more activities like zip-lining and horseback riding. You can explore the history and architecture of historic sites like Miramont Castle and Manitou Cliff Dwellings, visit the Manitou Springs Heritage Center, or enjoy some pampering at a day spa before catching a show at the Iron Springs Chateau Melodrama Theatre.

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.

_{Take a 7.5 mile hike on the Yampa River Core Trail along this picturesque river, and then jump into one of the hot pools at the Strawberry Park Hot Springs. Tread of Pioneers Museum tells the story of Steamboat Springs past and is located in a beautiful Queen Anne-style Victorian house. Take a ride with the Steamboat Scenic Gondola up the slopes of Mount Werner for some spectacular views of the area.}
Smith Fork Ranch is a traditional homestead within the Rocky Mountains and rolling meadows of Colorado featuring old-fashioned Western hospitality and sophisticated wine and cuisine. The cozy mountain lodges envelop guests in homely comfort with plush furnishings, wood burning fireplaces, original artwork, slate tiled bathrooms, handmade soaps and organic lotions, feather beds with fine linens, and hot tubs. The undulating landscape is teeming with wildlife and offers superb hiking, while activities on the ranch will keep honeymooners busy the entire stay.
_{More than 3,000 elk, 800 bighorn sheep and herds of mule deer and moose live in the park. For the best photography lighting and opportunities to spot massive bugling elk, head to Moraine Park just after sunrise. View bighorn sheep at Sheep Lakes May through mid-August and catch a glimpse of RMNP’s ever-elusive moose population along the Colorado River in the Kawuneeche Valley on the park's west side.}
^{All rooms include large desks, 26-inch flat screen TVs, same day laundry and dry cleaning service. Stay fit by working out at the fitness center which is open 24/7. The Corner Office Restaurant + Martini Bar serves a fresh global menu and creative cocktails. The hotel is located across the street from the Denver Performing Arts Complex, a block from the Colorado Convention Center and two blocks from 16th Street Mall. Rooms start at $249 per night.}

Dinosaur National Monument, in northwest Colorado, combines dramatic scenery with natural and cultural history to create one of Colorado's most interesting sites. Dinosaur remains embedded in exposed rock walls reveal evidence of the giants that once roamed these areas. Petroglyphs offer insight into the cultures and people that lived here long ago, and surrounding it all are cliff walls and the Green and Yampa Rivers snaking through the otherwise dry landscape.

The Experience: As you can tell by looking at this meadow of wildflowers, Crested Butte is a beautiful destination. In the summertime, you can paddle-board, fly-fish, rock-climb, hike, mountain-bike, and laze around the river. If you prefer a little more direction while exploring a new place, stay at the Sopris House or Scarp Ridge Lodge, both of which are run by Eleven Experiences, a company that marries upscale lodging, gourmet dining, and curated itineraries with hospitable experts guiding you throughout your entire stay.

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.