American Whitewater Association
American Whitewater is an excellent source of data for locating boatable rivers as well as navigation and access information. Additionally, it is a solid source for information and history surrounding riparian policy and access issues.
Boater Talks is a community run website featuring forums on equipment, techniques and paddling locations. It also features a robust classifieds section for used gear. The primary focus is on whitewater with other sections for surf and sea kayaking.
Focusing primarily on whitewater kayaking, Eddy Flower has a robust catalog of boats and gear to compare and contrast. It is an excellent source for finding out more information about a future boat purchase. The river information section is still in development.
Geared towards the open boat or canoe enthusiast, C Boats is an online community featuring information and resources for canoe selection, repair and techniques.
AAA State of Play
AAA State of Play discusses rock climbing, which, according to their website, appeals to many people, offering exhilarating challenges and enjoyable physical activity. Rock climbers can experience a rugged environment in its natural condition and scale heights they may never have dreamed of conquering. With instruction and practice, people of all ages and fitness levels can rock climb safely.
Rock climbing is a robust and comprehensive assemblage of photos, user reviewed information on routes and locations as well as articles on technique, training and equipment. It is one of the largest online communities for climbers of all disciplines.
Designed as a resource for finding and submitting information on routes all around the country, Supertopo features beta (that's climbing lingo for information about a climb) and downloadable topos (maps of climbing areas and route diagrams) for many of the country's popular climbing destinations.
Encompassing data for both face climbing and mountaineering, Mountain Project is a wealth of user submitted knowledge and information on climbing areas around the country and around the world.
Climbers who want to know whether or not to pack a poncho for their upcoming trip can check the climbing weather forecast for their favorite climbing destinations.
Hiking and Backpacking
Backcountry discusses backpacking. This website provides information for those who are ready to leave the campground behind and make the leap to bona fide backpacker. Backpacking allows people to avoid the crowds and nightly fees and enjoy miles upon miles of wild, open country. What’s not to love? Backpackers can load up the overnight pack, leave the car far behind and carry everything they need on their back which ups the ante from a standard day hike. With a little planning and preparation, backpackers can enjoy some of the most memorable outdoor experiences of their lives.
A magazine as well as an online community, Backpacking Light is a great resource for those looking to shed ounces in their packs. Reviews and a robust and active forum community offer loads of information on off the shelf products and DIY projects for the handy hiker.
Founded in 1892 by Yosemite advocate John Muir, the Sierra Club has long been a pillar of advocacy for the wild areas of North America. Their website is a superb resource for information and news on resource access and preservation issues. Sierra Club also offers opportunities to hit the trail with other members on club organized hikes.
International Mountain Bicycling Association (IMBA)
IMBA is a nonprofit, public supported organization that promotes mountain bicycling opportunities that are environmentally responsible.