I was wondering if any body knew how to build an agility course, or a website where I could find the plans for one. If you do, please tell. Thanks in advance!

Clean Run's website has some on it. We compete in NADAC and AKC agility.

[rlang]

Yes there is some good info and a diagram of an agility course at this web site Agility | www.americansportdog.com It also has a number of links to more agility associations.