It sounds like a fun 2 day event at Springdale Washington. That is
just a few miles North of Spokane. Lots of ride options there and
routes to it.
They have a competitive Motorcycle Rodeo with many different
events. I have heard some talk (maybe more) about an actual
Motorcycle Rodeo circuit. Sounds interesting.
There were around 900 bikes and 1200 people for the 3rd Annual
Springdake Motorcycle Rode. It was held on August 27th at the
Frontier Days Rodeo Arena.
Events include a Motorcycle Show, Rodeo, Poker Run, Beer
Garden, Food, Vendors, and Music.
I will try scheduling it in next year.
Check out some pictures.