Disc Dog University - a wonderful resource for all things DiscDog. Thee place to learn.
Toss and Fetch League - the hub of the world wide toss and fetch league
UpDog Challenge - the hub of the world wide UpDog fun! Bite Club League is based on UpDog games
Skyhoundz - the hub of the world wide disc dog competitions!
Hero Disc USA - great resource for a variety of competition discs
The Quadruped - long distance nation wide competition