Hey it's Marty.
As Hobie mentioned, there are the ones he mentioned that Dagger is sponsoring for sure. In addition OBJ is usually done by Brent Toepper (Pyranha rep), and I was going to try to pull together a Clear Creek of the Ark race around CKS's Paddlefest, but am having trouble finding assistance pull that together.
Lyons has a really serious creek race that you are going to love... Ask Clay about it, but it's on the South St Vrain. Very continous V+, all roadside (great for spectators) and is followed up with a freestyle comp at the Lyons WW park. It's been way upgraded over the past two years and looks great.
Homestake is always the bomb at Teva and Gore is a brutal, fairly long stroke through beefy IV+, V- ish type of fairly big water (It's not a creek, but creeky lines).
We'll see you soon!
"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body. But rather...To skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming... WOW !!!! What a ride!!!!!!"