The Yukon Canoe and Kayak Club hold a downriver race on the Yukon River every August. The 20 kilometer race is mostly non-competitive and allows recreational paddlers to get out on a section of river they might not normally paddle.
The 1999 coverage was excellent, so without further delay here are the links:
[ Whitehorse Star by Michael Onesi | Yukon News by Jillian Rogers ]