Tripoli Rocketry Association (TRA): http://www.tripoli.org/Default.aspx

(The Ottawa Rocketry Group is Prefecture #69 of TRA)

Canadian Association of Rocketry (CAR): http://www.canadianrocketry.org/index.php

National Association of Rocketry (NAR): http://www.nar.org/

Monroe Astronautical Rocketry Society (MARS): http://www.marsclub.org/new/

Upstate Research Rocketry Group (URRG): http://urrg.org/    (Home of LDRS 34)

Quebec Rocketry Club (QRC/CQF): http://www.clubqf.ca/en/index.html

The Rocketry Forum: http://www.rocketryforum.com/