C&O Canal National Historical Park Great Falls Park, Maryland and National Park Service Site for the C&O Canal.
Chesapeake and Ohio Canal The C&O Canal Association site.
Great Falls Park National Park Service Site for Great Falls Park, Virginia.
Anacostia Watershed Society www.anacostiaws.org
Potomac Conservancy
www.potomac.org
Potomac Riverkeeper, Inc.
1-202.222.0707
keeper@potomacriverkeeper.org
West Virginia Rivers Coalition
1-304-637-7201
www.wvrivers.org
Friends of the Cheat
1-304-329-3621
www.cheat.org
American Whitewater
1-866-BOAT-4-AW
American Canoe Association
1-540-907-4460
American Rivers
1-202-347-7550
Team River Runner
Multiple chapters in DC area.
www.teamriverrunner.org