I've been talking with some friends out on the left coast who are
working on a new boat design that believe will be a seriously fast
mover. They would like to put it to the test by entering a race or two,
but due to some design features that make the boat fly it's a no-fly
in most any race with entry rules.

I know there are a few races around, like the Wye Island Regatta:

http://www.annapolisrowingclub.com/wyeisland.htm

that are essentially open to any human-powered craft.

Does anyone know of similar races in Washington, Oregon or northern
California?

One aspect of the Wye race I really enjoy is seeing the variety of
boats and the mix of canoes, kayaks, outriggers, wherrys, dorys,
sea-cycles. Not to mention homebuilt craft three and four person canoes
and kayaks, experimental designs and just plain oddities.

Yes, an eight-person war canoe (nine if you count Sailor Jerry) is
definitely an oddity.

There's gotta be something like that in the Pacific northwest.

???