- Adventure Bound River Expeditions
 - White water rafting and camping in Colorado and Utah. - Adventure Company, The
- Whitewater rafting outfitter with beginning to advanced trips through Brown's Canyon, Royal Gorge, Numbers, Colorado, and Arkansas Rivers. Also offers biking trips over Boreas Pass and hiking around Mohawk Lakes.
- Adventures Afoot
- Wilderness backpacking, backcountry skiing, and snowshoeing in the Rocky Mountains. Stress-free holidays for all levels of outdoor enthusiasts.
- Adventures Out West
- Hot air balloon flights, whitewater rafting, horseback riding, fishing, and jeep trips in Colorado and Arizona.
- Anchorage Farm
- Working horse ranch offering bed and breakfast accommodations, riding lessons, holidays on horseback, and dressage instruction.
- Arkansas River Tours
- Offers rafting trips in Colorado, New Mexico, and Texas ranging from short family outings to six day wilderness expeditions.
- Arkansas Valley Adventures
- Offers float and raft trips with accommodation, camping, and other amenities available.
- Blazing Adventures
- Specialties include rafting, biking, four-wheel-drive tours, hiking, and winter activities in the Snowmass/Aspen area.
- Blue Sky West
- Trips include snowcat powder skiing on the Continental Divide, fly fishing, mountain biking, rafting, and women's adventures.
- Boulder Outdoor Center, Inc
- Offers equipment, rentals, lessons, and guided trips in both the winter and summer seasons. Specialising in snowshoeing and paddlesports.
- Buffalo Joe's River Trips
- Offers guided white water raft trips and gourmet lunches on Colorado's Arkansas River and Royal Gorge.
- Canyon Bikes
- Rental bikes and shuttle service for the Glenwood Canyon Bike Trail.
- Canyon Passages
- Offering guided canoe trips in the Colorado Plateau Canyon Country.
- Colorado ATV Tours
- Offers backcountry tours.
- Colorado Mountain Expeditions
- Offering guided horseback, hiking, and fishing adventures in the San Juan Mountains and Weminuche Wilderness.
- Colorado Outdoor Solutions
- Provides state-wide listings of outfitter and guide service trips for fly fishing, whitewater rafting, and wilderness pack trips as well as big game hunts.
- Colorado Raft Guide
- Complete guide for whitewater rafting in Colorado. Features maps, suggested trips, mom's picks, and links to outfitter web sites.
- Colorado River Canoe Trips
- Offers guided canoe trips down the lower Colorado River from Blythe, California to Yuma, Arizona.
- Colorado Trips
- A wholesale tour operator specialising in Colorado and Arizona holidays.
- Colorado Trophy Hunting With Don Hawkins
- Leads big game trophy hunts on 16,000 acres of private land in the Norwood area for elk, deer, bear, and cougar.
- Colorado Trout Hunters
- Colorado fly fishing adventures, lessons, guided trips, and information on blue ribbon trout fishing near Denver.
- Colorado West Jeep Rentals & Tours
- Explore ghost towns, old mining camps, and gold mines in and around Ouray Colorado.
- Desert Storm Hummer Tours
- Offers adventure Hummer tours in Arizona's Tonto National Forest and Colorado's San Juan Mountains.
- Dreamrides Custom Mountainbiking Tours
- On Slickrock Trail and others. Movie location services as well.
- Durango Mountain Bike Camp
- Colorado coed summer camp for kids and adults alike offering sessions for all ability levels.
- Durango Rivertrippers
- Offering 2-4 hour whitewater rafting and kayaking trips on the Animas and Dolores rivers in Durango, Colorado.
- East Fork Outfitters and Guides
- Offer fall elk hunting and summer pack trips and trail rides in South San Juan National Forest.
- Echo Canyon River Expeditions
- Whitewater rafting on the Arkansas River through the Royal Gorge in Colorado. Echo Canyon River Expeditions provides family trips on up to adventure class rafting with knowledgeable guides.
- Elite Action Tours
- Offers snowmobile rentals, riding lessons, and tours.
- Enchanted Lands Bicycle Tours
- Organised tours and adventures in New Mexico and the Southwest.
- Expeditions International
- Front range mountain guides of Colorado.
- Four Corners Rafting
- Rafting on Colorado's Arkansas and Dolores Rivers.
- GEO Tours
- Offering tours on Clear Creek, the Upper Colorado River, and the Arkansas River.
- Gunslingers, Ghosts, and Gold
- Offering historical walking tours and paranormal investigatons in the Denver area.
- High Altitude Jeep Adventures
- Offers naturalist guided jeep tours and outdoor adventures in Colorado Springs and the Pikes Peak Region.
- Holiday River and Bike Expeditions
- Offeing adventure whitewater rafting and mountain biking holiday packages in the states of Utah, Colorado, Arizona, and Idaho.
- Hubbard Creek Outfitters
- Located in Western Colorado, offering hunting, horseback, and fishing trips.
- KB Mountain Adventures
- Combination adventures, including, climbing, hiking, rafting, and horseback riding from Bear Basin Ranch.
- Kids Go Too
- Providing customised Rocky Mountain holiday planning and travel packages for families travelling with children of all ages.
- Kim Reichhelm’s Skiing Adventures
- World ski extreme champion Kim Reichhelm offers ski clinics tailored to both men and women.
- Krabloonik Restaurant and Kennel
- Touring dog sled kennel and wild game restaurant located on the slopes of the Snowmass Ski Area, just minutes from Aspen.
- Lost Paddle Rafting
- Experience the thrill of whitewater rafting in Colorado with Lost Paddle Rafting. Trips from mild to wild, including half day, full day, and overnight multi-day riverside camping trips.
- Mild to Wild Rafting
- Rafting and whitewater river trips in southwest Colorado and Arizona.
- Mountain Waters Rafting, Inc.
- Whitewater rafting, kayaking, and canoeing adventures on the Upper and Lower Animas and Piedra Rivers.
- MountainBikeAdventures.net
- Provides mountain bike tours, rides, and trails operating out of the Durango Mountain Resort of Colorado.
- Outlaw Rivers and Jeep Tours
- Offering jeep, rafting, snowmobile, and sleigh ride tours.
- Pack Country Outfitters
- Offers elk and deer hunts, tent and private and secluded cabin rental, and numerous backcountry adventures.
- Performance Tours Whitewater Rafting Company
- Offers mild float trips and adrenaline-pumping whitewater trips daily on the Arkansas, Blue, and the Colorado rivers.
- Renaissance Adventure Guides
- Offers tours, treks, rafting, kayaking, and adventure travel to destinations including East Africa, South America, and Costa Rica. Provides kayaking, skiing, rock climbing, and avalanche courses in Colorado.
- Riding Stables and Outfitters, Inc.
- Offering family horseback riding, cattle drives, pack trips, and more.
- Rim Tours
- Trips include Moab, Canyonlands, Bryce and Zion National Parks, and North Rim of the Grand Canyon.
- Rimrock Outfitters
- Breakfast and dinner rides, camping and packing trips, guided hunts for the physically challenged, and horse leasing. Located in the foothills of the La Plata Mountains.
- Riverfront Hunt Club
- Offers complete guide services for duck and goose hunting in Colorado and Nebraska using fibreglass pit blinds that are also available for sale.
- Rocky Mountain Outdoor Center
- Whitewater rafting on the Arkansas and Dolores Rivers.
- Rocky Mountain Snowboard Tours
- Offers snowboarding and mountain bike tours in Colorado and Utah.
- Royal Gorge Route
- Two hour train ride through the Royal Gorge of Colorado.
- San Juan Mountain Guides
- Offers personalised professional instruction and guiding in the art of mountaineering and ice and rock climbing in Southwest Colorado.
- Ski Train
- Takes skiers and sightseers to enjoy a day at one of Colorado's winter resorts.
- Snow Ventures
- Offering ski holiday packages for Keystone, Breckenridge, Steamboat, Vail and other destinations. From Snow Ventures.
- Sombrero Ranches, Inc.
- Horseback riding on scenic trails in the Rocky Mountains and Colorado. Also offers hunting and fishing trips.
- Southwest Adventures
- Offers climbing and mountaineering expeditions in Southwest Colorado and select high altitude locations worldwide.
- Spring Break Vacations
- Offers online holiday reservations for spring break, winter break, lift tickets, accommodation, and more.
- Steamboat Snowmobile Tours
- Offers two hour, dinner, and half day tours in the Flat Tops area and elsewhere.
- T Bar M Outfitters
- Offers horseback excursions and big game hunting in Colorado, Utah, and Arizona.
- Telluride Helitrax
- Provides helicopter skiing and snowboarding charters in Telluride, Colorado.
- Tellurideadventures.com
- Offers Telluride area outdoor activities with guided outdoor instruction in kayaking and rafting, rock climbing, hut to hut skiing, avalanche education, hiking and backpacking, mountaineering, and more.
- Timberline Tours
- Offers whitewater rafting and backcountry jeeping in the Vail Valley.
- Trapax
- Offering jet boat, air, and ATV tours, river trips, horseback riding, and dinners along the Colorado River in Canyonlands National Park and Moab, Utah.
- Triple O Outfitters
- Offering summer trail riding activities, hunting, and women-only outdoor programmes in Northwest Colorado.
- Turkey Creek Motorcycle Tours
- Provides four, five, and eight day, all-inclusive guided motorcycle tours in Colorado from June through September. Also offers custom tours.
- Van Beacham's Solitary Angler
- Offers fly-fishing guide services in New Mexico, Wyoming, Colorado, and Mexico
- Western Adventures
- Offers guided 4-wheel drive trips in the Western U.S. and Mexico. Also offers an off-highway driving school.
- Whitewater Encounters
- Offers whitewater rafting trips on the Arkansas River in Colorado.
- World Wide River Expeditions
- Offering whitewater rafting trips on the Colorado, Green Rivers, and the Main Salmon River.
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