- Adventures Afoot
 - Leadville - Wilderness backpacking, backcountry skiing, and snowshoeing in the Rocky Mountains. Stress-free holidays for all levels of outdoor enthusiasts. - Adventures to the Edge, Ltd.
- Crested Butte - International mountain guide service in Colorado offering courses and guided climbing, skiing, backpacking, and other tours locally and around the world.
- Bar-Nunn Hunting
- Laramie - Elk, mule, deer, and antelope hunting on private ranch in southeastern Wyoming.
- Blazing Adventures
- Snowmass Village - Specialties include rafting, biking, four-wheel-drive tours, hiking, and winter activities in the Snowmass/Aspen area.
- Blue Sky West
- Steamboat Springs - Trips include snowcat powder skiing on the Continental Divide, fly fishing, mountain biking, rafting, and women's adventures.
- Boulder Outdoor Center, Inc
- Boulder - Offers equipment, rentals, lessons, and guided trips in both the winter and summer seasons. Specialising in snowshoeing and paddlesports.
- Colorado Mountain School
- Estes Park - Offers climbing and mountaineering guided tours in Estes Park, Longs Peak, and Rocky Mountain National Park, and all over the world.
- El Diablo Alpine Guides, Inc.
- San Juan County - Offers snowcat powder skiing excursions in the San Juan Mountains.
- Elite Action Tours
- Lakewood - Offers snowmobile rentals, riding lessons, and tours.
- Elkhorn Outfitters, Inc.
- Craig - Specialising in quality full service hunts for deer, elk, and antelope, as well as fishing, snowmobiling, and horseback trips.
- Expeditions International
- Boulder - Front range mountain guides of Colorado.
- Fair Winds Hot Air Balloon Flights
- Boulder - Enjoy spectacular views of the Rocky Mountains from the basket of a hot air balloon as you float over Boulder, Colorado.
- Gunslingers, Ghosts, and Gold
- Denver - Offering historical walking tours and paranormal investigatons in the Denver area.
- Human Ski-In, The
- Breckenridge - Winter sport gathering of Deadheads in Breckenridge, Colorado to ski, snowboard, and holiday in the Rocky Mountains. March 28 - April 5.
- Kent Mountain Adventure Center
- Estes Park - Offers wilderness adventure courses in backpacking, rock climbing, kayaking, mountain biking, and 'no-impact' camping.
- Kim Reichhelm’s Skiing Adventures
- Crested Butte - World ski extreme champion Kim Reichhelm offers ski clinics tailored to both men and women.
- Krabloonik Restaurant and Kennel
- Snowmass Village - Touring dog sled kennel and wild game restaurant located on the slopes of the Snowmass Ski Area, just minutes from Aspen.
- Patagonia Expeditions
- Broomfield - Offering fly fishing tours, specialising in Patagonia.
- Rainbow Expeditions II
- Wheat Ridge - Backpacking treks and wilderness retreats in Utah's Canyon Country, the Navajo Nation, Texas¿s Big Bend and the High Sierras of California.
- Rocky Mountain Vacations
- Glenwood Springs - Offering air-inclusive ski packages to all major western ski resorts.
- Rocky Mt. Retreats
- Lyons - Offering themed tours, workshops, and retreats focusing on the mind and spirit.
- Snow Ventures
- Breckenridge - Offering ski holiday packages for Keystone, Breckenridge, Steamboat, Vail and other destinations. From Snow Ventures.
- Sombrero Ranches, Inc.
- Boulder - Horseback riding on scenic trails in the Rocky Mountains and Colorado. Also offers hunting and fishing trips.
- Storm Chasing Adventure Tours
- Aurora - Offers tours in Tornado Alley.
- Student Express Spring Break Trips
- Denver - Offering trips to Mexico, Jamaica, Florida, and other destinations.
- Telluride Outside
- Telluride - Four-season adventure company offering a variety of outdoor activities.
- Tenderfoot Outfitters and Guide Services
- Gunnison - Offering summer horse back trail rides, guided hunting, and pack trips.
- Triple O Outfitters
- Hamilton - Offering summer trail riding activities, hunting, and women-only outdoor programmes in Northwest Colorado.
- Warming House
- Estes Park - Adventure outfitters.
- Welder Guiding and Outfitting
- Meeker - Hunting, fishing, snowmobiling and pack trip guides in northwest Colorado.
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