- Action Whitewater Adventures
 - Whitewater raftingtrips on Idaho's Main Salmon, Middle Fork, Grand Canyon, American, Kern, Green, Tuolumne, and Rogue rivers. - Adventure Connection
- Offers a variety of packages on rivers throughout California.
- Adventure Photo Tours
- Offers 4x4 photo tours of the Mojave Desert, Grand Canyon, and the area surrounding Las Vegas.
- AfricanAmericanSF.info
- African American heritage tours, events, and news in the greater San Francisco area.
- Alisal Guest Ranch and Resort
- Tucked away in a quiet corner of the picturesque Santa Ynez Valley, featuring golf, tennis, fishing, and horseback riding.
- All Los Angeles Tours
- Offers tours of Los Angeles City, theme parks, Hollywood, and shopping in Tijuana.
- All San Diego Tours
- Offers tours of San Diego City and Bay, Seaworld, and the San Diego Zoo.
- All-Outdoors California Whitewater Rafting
- Offers guided rafting trips on ten California rivers.
- American River Recreation
- Offers half to three day whitewater rafting trips on the American and Merced rivers of California.
- American Whitewater Expeditions
- Offers rafting adventures for Class III, IV, and V rapids on the American River of California.
- Andiamo Adventours
- Offers bicycle, hiking, and activity combination holidays in Italy, Switzerland, France, and California.
- Angel Island TramTours and Catered Events
- Located in the middle of the San Francisco Bay.
- Aquasports
- Specialises in sea kayaking through caves in California's Channel Islands National Park.
- Art Excursions
- Provides art, architecture and cultural tours to international and domestic museums and cities.
- Baja Off Road Tours
- Chris Haines' cross-country rides across the Baja California peninsula.
- Behind the Scenes
- Full service destination and event management company. Services include Wine Country tours, art and shopping nights in San Francisco, cigar nights, etc.
- Beyond Limits Adventures
- Specialising in river tours in California's Gold Country. Rafting, canoeing, and kayaking, tours, sales, and rentals.
- Bigfoot Rafting Company
- Offers guided day trips and multi-day campouts on the Trinity, Klamath, Salmon, and Smith Rivers of Northern California.
- Blue Waters Kayaking
- Offers naturalist-led sea kayaking tours, rentals, and classes.
- California Motorcycle Tours
- Guided rides through the coastal mountains, the Mohave desert or the Sierra-Nevada mountains. Featuring Harley Davidson motorcycles.
- California Parlor Car Tours
- Tours in California, such as Yosemite National Park, Monterey, Hearst Castle, Big sur, Mono Lake, Lake Tahoe, Pebble Beach, and more.
- California Vintage Vacations
- Weeklong tours of Napa and Sonoma Valley.
- Canyon Connection
- Guide to Kern River's famous (class 1-5) raft and kayak sections.
- Captain Kirk's San Francisco Sailing
- San Francisco sailing charters on a 36 foot yacht with an experienced, licensed captain. Offers private charters and boat rentals for all events, including day sailing, birthdays, engagements, and weddings.
- Cass' Marina Sailing Adventures
- Offering sailing adventures on SF Bay for over 36 years. Charters and instruction.
- Cat Ballou
- Offering chartered catamaran cruises, day sails, team building and offshore adventures in Northern California, San Francisco Bay, and Mexico.
- Catalina Express
- Offers daily boat departures from San Pedro, Long Beach, and Dana Point to the Catalina Island.
- Catalina Island Expeditions
- Guided kayak tours along Catalina Island's rugged coastline.
- Catalina Kayak Adventures
- Snorkel and kayak rentals and guided tours on Catalina Islands.
- Central Coast Kayaks
- Offers tours, classes, and rentals.
- Champagne Tours
- Specialising in gambling trips to Nevada and California casinos as well as West Coast sightseeing tours.
- Coast Tours
- Scenic tours of California's central coast.
- Colonial Crafts
- Offers restored private railroad passenger car that may be chartered on Amtrak routes to San Diego, Oakland, Seattle, Denver, Chicago, New Orleans, and beyond.
- Country Spokes Bicycle Tours
- Offers bicycle tours in California with gourmet dining and luxury camping.
- Cousin Jess Motor Tours
- Offers a self-guided audio tour of Orange County, California, from a local's perspective. Includes points of interest, restaurants, activities, and history.
- Custom Motorcycle Tours, Inc.
- Offers custom or pre-planned tours through California.
- CyclePaths Mountain Bike Adventures
- Specialises in offroad mountain bike tours of Lake Tahoe, the Sierra Nevadas, and Northern Baja.
- Desert Adventures
- Offering jeep eco tours of the Coacella Valley, near Palm Springs.
- Diving Charters, Inc.
- Single and multi-day scuba diving trips to the Channel Islands of California aboard the Sand Dollar.
- DJ'S Snowmobile Adventures
- Offers guided tours and rentals in the Eastern Sierras.
- EarthTrek Expeditions
- Offers whitewater rafting adventures on the rivers of California including the American River in the Sierra Gold Rush Country.
- Elkhorn Slough Safari Nature Boat Tours
- Observing shorebirds, sea otters, and all sorts of wildlife.
- Escape Artist Tours, Inc.
- Arranging unique and hard-to-find events and hands-on activities, custom designed tours.
- Explorer's Club
- Tours for children and/or their families of San Francisco and the Bay Area. Day trips packed with fun and learning opportunities.
- Extranomical Adventures
- Offers sightseeing tours of Yosemite National Park, wine tasting in Sonoma and Napa Counties, and Sequoia Redwoods hiking tours in Muir Woods.
- Feng Shui Immersion Program
- Visits the birthplace of feng shui, including sacred Buddhist and Taoist mountains, temples, and more. May 7-22, 2000
- Five Brooks Ranch
- Family riding stable located in the Point Reyes National Seashore. Offers guided trail, hay wagon, and pony rides as well as horse boarding and riding lessons.
- Gabriola Cycle and Kayak
- Offering sea kayaking adventures in British Columbia and Baja and cycling tours in Arizona, Oregon, Napa Valley, Baja, and mainland Mexico.
- Gold Prospecting Expeditions
- Offers trips for families, schools, and tour buses.
- Gold Rush Whitewater Rafting
- Provides adventure river rafting holidays on the South Fork of the American River, located in Coloma, California, for beginner and experienced whitewater rafters.
- Grape to Glass Wine Tours
- Private educational wine tours in Napa and Sonoma, including accommodations and transportation.
- Gringo Express Tours
- Gold prospecting and panning in the Gold Country.
- Haute LaTOUR
- Specialising in small, private wine tours for two to six people in the Napa Valley.
- Horse Corral Pack Station
- Offering day or extended horseback trips to the Kings Canyon/Sequoia National Park wilderness.
- HUMMERtrader.com
- Features classified listings of Hummers, accessories, and gear.
- Incredible Adventures
- Adventure camping trips to Yosemite National Park, Lake Tahoe and more.
- Jeff Sainsbury Tours
- Jeff Sainsbury Tours leads garden tours through Europe, Brazil, and California.
- Kauai Nature Tours
- Offers one-day trips with short hikes led by local guides, to various parts of Kauai. Topics include natural history, cultural history, and human interaction with the natural environment.
- Kern River Outfitters
- Offers whitewater trips, tours, and school.
- Kern River Tours
- Offering a variety of trips to suit all ages and experience levels.
- Kettle Valley Steam Railway
- Offers historic train rides through Summerland.
- Kings River Expeditions
- A Class III river perfect for beginning to intermediate rafters.
- Leave No Trace Adventures
- Offers guided educational backpacking trips in the Sierra Nevada of northern California.
- LeeLin Llama Treks
- Featuring guided treks through Yosemite, Sequoia, and Kings Canyon National Parks.
- Live Art
- Offers 10 day summer workshops in painting, writing, French cooking, and dance in a medieval village in the south of France.
- Living Waters Recreation
- Offers trips in northern California and Oregon.
- Lost Coast Trail Rides
- Leads horseback riding trips in Mendocino County featuring the ocean and forest trails of the Lost Coast.
- LunaTours
- Outdoor adventures and supported road bikes tours for women in Montana, Utah, and Northern California.
- Mammoth Lakes Pack Outfit
- Offers pack trips with guides, horses, and mules in the Eastern Sierra Nevada wilderness east of Yosemite.
- Mariah Wilderness Expeditions
- Provides exciting and challenging outdoor experiences in whitewater rafting in California.
- Monterey Bay Kayaks
- Kayak touring company.
- Mountain & River Adventures
- Outdoor trips for the whole family in California including rafting, climbing, cycling, skiing, and paddling.
- Moving Over Stone
- Climbing school and guide service for rock climbing, backcountry skiing, mountaineering, and corporate training in the Silicon Valley and High Sierra.
- Mr. Toad's Tours
- Hop on one of Mr. Toad's pre-1930s vehicles for a once in a lifetime tour into the heart of San Francisco, California.
- Napa Valley Bike Tours
- Offering guided tours via bicycle with wine tasting and picnics in Napa Valley.
- Outback Adventures
- Guide service and rental shop specialising in kayaking, backpacking, and climbing in California.
- Outdoor Aventures
- Offers whitewater river rafting trips in California, Oregon, and Idaho.
- Paddle Sports of Santa Barbara
- Sales, rentals, classes, and guided trips along the Santa Barbara coastline and Channel Islands National Park.
- Reid Horse & Cattle Co., Inc.
- Offering pack trips, wagon trips, and trail rides in Plumas County, CA.
- Ricochet Ridge Ranch Horse Riding Vacations
- Unique riding holidays on the beach and redwood forest: accommodation at Bed & Breakfast inns, hot tubs, entertainment, English or Western instruction.
- RideFree Motorcycle Tours
- Offering motorcycle rides in the California deserts and along the coastline.
- River and Rock Adventures
- Offers fun-filled rafting, kayaking, climbing, and mountaineering trips in Northern California.
- River Dancers
- Guiding rafting trips on the West coast of the U.S.
- Roaring Camp Railroads
- Offers Santa Cruz railroad tours, Redwood attractions, company picnics, family holidays, and corporate adventures.
- Rogue/Klamath River Adventures
- River rafting outfitter specialising in excursions on the Rogue and Klamath Rivers of Southern Oregon and Northern California.
- San Diego Bike and Kayak Tours Inc.
- Provides kayak, bike, and snorkeling tours and equipment rentals in La Jolla Shores. Also includes kayak tour of the La Jolla sea caves and bike tour of La Jolla, Coronado, and San Diego.
- San Diego Railroad Museum
- Dedicated to the preservation and interpretation of railroads as they existed in the Pacific Southwest; information on train rides available on actual vintage equipment.
- San Francisco Shuttle Tours
- Comprehensive tours of San Francisco's most popular attractions. Features more tour stops, free ferry cruises and refreshments, and a separate tour guide from the driver.
- Santa Barbara Adventure Company
- Tours and adventures include sea kayaking, hiking, mountain biking, and wine tasting.
- SeaClypse Dive Adventures
- Offers scuba diving and snorkeling tours in San Diego. Specialises in small groups.
- Shasta Mountain Guides
- Specialising in guided Mt. Shasta climbs, mountaineering, rock climbing trips and instruction.
- Sierra Mac River Rafting Trips
- Dedicated to providing exceptional white water river trips on outstanding wild rivers with expert guides.
- Skunk Train
- Offers three modes of transportation: the Old No. 45 Steam Engine, the vintage 1925 or 1935 Motorcars, and Super-Skunk diesel powered locomotives.
- Sonoma Cattle Company and Napa Valley Trail Rides
- Professionally guided horseback riding adventures for novice and expert riders.
- Soussan's Wine Tours
- Offers tours with reserve tastings, personal wine shopping, and education classes.
- Super Sightseeing Tours
- Offers a wide range of tours in the San Francisco Bay Area.
- Tahoe Trips & Trails
- Offers one to five day packaged tours and private customised trips that include hiking, mountain biking, kayaking, rafting, and snowshoeing.
- To Fly L.A.
- Full-service helicopter charter and tour company. Also provides movie and television production helicopters.
- Travel Teens
- Educational field trips for students.
- Trinity River Rafting
- Offers multi-class whitewater rafting trips on the Trinity and Klamath Rivers.
- Turtle River Rafting Company
- Offering guided rafting trips in northern California and southern Oregon.
- Undiscovered Country Tours
- Provider of road bicycle tours for adults exclusively in California. Undiscovered Country Tours are available throughout the year.
- Virginia Lakes Pack Outfit
- Offers Yosemite back country tours with horses and mules.
- W.E.T. River Trips
- Whitewater rafting on California rivers.
- Western Adventures
- Offers guided 4-wheel drive trips in the Western U.S. and Mexico. Also offers an off-highway driving school.
- Whitewater Adventures
- Offering rafting trips through volcanic canyon wilderness.
- Whitewater Excitement Rafting Company
- California whitewater rafting on the American and Merced Rivers. Adventure travel in foreign countries too!
- Whitewater Voyages
- Offering over 20 whitewater rafting runs in California and Oregon.
- Wilderness-Spirit Outfitters
- Leads backpacking and mule-supported trips that include yoga, ecology, guitar, healing retreats, and cross-country trekking in California's Marble Mountain Wilderness and King Range/Lost Coast area.
- Wine Country Jeep Tours
- Winery tours in Sonoma and Napa. Also offering redwood, off-road, and coastal tours.
- Wine Country Safari
- Wine tasting and touring in Napa, Sonoma, and Russian River wine country.
- Wine Country Tour Shuttle
- Wine Country tours from San Francisco. Small group tours to Napa and Sonoma wineries, with a separate tour guide and driver for each trip.
- Wine Tutor, The
- John Thoreen guides two-day open, private, or custom excursions through Napa Valley.
- Yosemite Mountain Sugar Pine RailRoad
- Scenic railroad excursion.
- Yuba Expeditions
- Provides guided mountain bike tours in the Gold Country of Downieville and Nevada City, CA.
- Zephyr Whitewater Expeditions
- Offers whitewater rafting adventures on the Kings, Tuolumne, and Merced Rivers near Yosemite, California.
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