Rising from 7,800 feet to 12,000 – even 14,000 feet in some places – RMNP is a high-elevation park and if you don't give yourself time to adjust to the thinner atmosphere and lower oxygen levels, you could run the risk of getting the headaches, nausea and disorientation characteristic of altitude sickness. Along with taking a day or so to acclimate to the high altitude, you should make sure to consume plenty of water and food to ward off symptoms. 

Rocky Mountain National Park encompasses 265,461 acres (414.78 sq mi; 1,074.28 km2) of federal land,[1] with an additional 253,059 acres (395.40 sq mi; 1,024.09 km2) of U.S. Forest Service wilderness adjoining the park boundaries.[24] The Continental Divide runs generally north–south through the center of the park,[25] with rivers and streams on the western side of the divide flowing toward the Pacific Ocean while those on the eastern side flow toward the Atlantic.[26]

Perched on the western edge of the Rocky Mountain National Park, Grand Lake is the perfect weekend destination for outdoor enthusiasts and families traveling with kids. Providing easy access to hiking, Grand Lake is home to wildlife watching and winter activities such skiing and snowshoeing, where visitors are spoiled for choice in how they spend their days. A picturesque marina offers boat rentals and paddle boards, while there are sandy spots that are perfect for beach-related activities. Those who want to explore the area should drive along the scenic Trail Ridge Road and venture into the park to the nearby town of Estes Park on its other side.

It’s always “do not disturb” mode at this quaint adults-only hideaway in Crested Butte that’s strictly 16-plus. Just a few blocks from historic Elk Avenue, Purple Mountain Bed & Breakfast has six plush rooms, an onsite day spa and an outdoor hot tub. In the winter, a free shuttle whisks you to Mt. Crested Butte for some of Colorado’s best skiing; when you’re ready for après, retire back to the house for complimentary craft beer on tap and a Ghirardelli hot chocolate bar you won’t have to share with the kids. Happy hour, indeed. Find more B&Bs in Colorado >> 
Now part of the Estes Park Condos family, Black Canyon Inn offers privately owned condos and a stunning log cabin — all located off of the beaten path but still within Estes Park. Max occupancy options range from two guests in the secluded Columbine Cabin all the way up to ten guests in other lodges. See all of them here and enjoy jaw-dropping photos and views before you arrive!
The house also features a hot tub on the second-floor deck, a modern entertainment living room with a large, flat screen television for movie watching and a lovely terraced back garden with a gazebo. Winter Park Chateau enjoys a prime downtown location within walking distance to many restaurants, cafés, and bars, as well as nightclubs. It is within walking distance of the ski mountain and close to four championship golf courses and Rocky Mountain National Park.
Located only a 30-minute drive from Denver, Boulder holds its own with its abundance of lush parks and beautiful landscapes. A city with a hippie-like vibe, visitors who explore this area will be delighted to discover an array of shops, breweries and cafes. In addition to its thriving arts and cultural attractions, visitors can lace up their boots and head to the trails at Boulder Creek Path, Eldorado Canyon State Park and the Flatirons. Home of the University of Colorado, plenty of restaurants and drinking establishments are available to choose from, while visitors who are looking for a place to relax can also have a spot of tea at the Celestial Seasonings Tea Factory.
^{Experience diverse ecosystems during your visit to Estes Park, your jumping-off point for Rocky Mountain National Park, which offers many things to do, from guided tours and camping to hikes and stargazing. It’s a great place for solo travelers, as well as families and those traveling with larger groups. Fun activities available include mountain biking, kayaking, going horseback riding, as well as miniature golf, rodeos and amusement parks, to name a few.}
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.

ItineraryThis is a typical itinerary for this productStop At: Images of Rocky Mountain National Park, Estes Park, ColoradoEnjoy winter in all its beauty and head for the mountains on this incredible 8-hour tour to Rocky Mountain National Park. Around each corner are breathtaking views, alpine lakes and wildlife in a serene setting. Wintertime is the perfect to head to the park as the snow capped mountains are truly breathtaking with the peace and tranquility the mountains have to offer.Duration: 5 hours

When it comes to the best weekend getaways in Colorado, Colorado Springs is a top choice with a little bit of everything—numerous hiking trails, interesting museums, an artsy historic district, and plenty of restaurants and breweries. It’s also home to Garden of the Gods, a National Natural Landmark featuring hiking, climbing, and stunning views at the foot of Pikes Peak.