Some outdoor groups…feel free to leave a comment with others we should add!
New England
Get Outdoors New England - http://www.GONewEngland.org
Northwest
http://www.cascadians.org/ - “The Cascadians is an outdoor recreation and conservation club located in Yakima, Washington. Activities include hiking, backpacking, climbing, skiing, bicycling, kayaking, and rafting. Cascadians have been enjoying the trails and peaks of the Pacific Northwest since 1920. ”
http://www.yakimaoutdoors.net/ - A site with info, trip/trail reports, and photographs on trails in the Yakima Washington area, as well as web resources and a forum.