A1 Trails Guide
Covers biking, hiking, and cross-country skiing for the United States and Canada. Includes links to books, clubs, and outfitters plus maps of trails.
www.a1trails.com Details

ActiveZach
Includes event listings and discussion forum in addition to links organized by activity type and region. United States only.
www.activezach.com Details

Adventure Sports Holidays
Global adventure sports directory. Search by region or country. Sports include paragliding, kitesurfing, scuba diving, and skydiving.
www.adventuresportsholidays.com Details

Adventure Sports Online
Resource for outdoor sports, activities and gear. Choose from biking, climbing, fishing, hiking, kayaking, canoeing, skiing and whitewater rafting.
www.adventuresports.com Details

Adventure Years
Offers a database of outdoor activities from boating and flying to wilderness adventure. Search by state or adventure type.
www.adventureyears.com Details

America Outdoors
National trade association representing the interests of over 550 professional companies that provide outdoor recreation services and equipment. Includes search by activities and states.
www.adventurevacation.com Details

America Outdoors
A directory of hunting and fishing guides in North America.
www.america-outdoors.com Details

Andinia.com
Search engine dedicated to outdoors enthusiasts and adventurous spirits. Contains links to survival, extreme sports, travels, mountaineering, games, real experiences, and tips. [English, Spanish and Portuguese]
www.andinia.com Details

Atlas Adventure
Includes links to forums, classifieds and upcoming calendar events.
www.atlasadventure.com Details