American Canoe Association (ACA)
7432 Alban Station Blvd., Suite B-226
Springfield, VA 22150
Phone:(703-451-0141

American Mountain Guides Association
710 Tenth Street, Suite 101
Golden, CO 80401 USA
Phone: 303-271-0984

American Water Ski Association
799 Overlook Drive
Winter Haven, FL 33884
Phone: 941-324-4341

Association for Challenge Course Technology
P.O. Box 255
Martin, Michigan 49070-0255
Phone: 616-685-0670

Civilian Marksmanship Program
PO Box 576
Port Clinton, OH 43452
Phone: 419-635-2141

National Association of Underwater Instructors (NAUI)
9942 Currie Davise Drive, Suite H
Tampa, FL 33619-2667
Phone: 813-628-6284
Toll Free: 800-553-6284

National Outdoor Leadership School (NOLS)
288 Main Street
Lander, WY 82520-3140
Phone: 307-332-5300

National Recreation and Park Association (NRPA)
22377 Belmont Ridge Road
Ashburn, VA 20148
Phone: 703-858-0748

National Wildlife Federation (NWF)
8925 Leesburg Pike
Vienna, VA 22184
Phone: 703-790-4000

Professional Association of Diving Instructors (PADI)

River Skills Center
Box 1057, McCloud CA 96057
Phone: 530-964-2544

U.S. Sailing Association
P.O. Box 1260
15 Maritime Drive
Portsmouth, RI 02871-0907
Phone: 401-683-0883

Wilderness Education Association (WEA)
1101 Otter Creek Road
Nashville, TN 37220
Phone: 615-331-5739