What type of events are you looking for?
I go out on the trails pretty often, most of the trails I normally run you run a good chance of body and/or mechanical damage.
James duff Int is having a event in Sequim, WA on the 15th of July
The PNW4WDA (Pacific Northwest 4 wheel Drive Associaction) is have a region 2 Mud Bog in Buckley,WA on the 15th of July
The faithwheelers offroad club is having a mud bog/obstacle course in Buckley,Wa 29th of July
The last weekend in August at Evans Creek ORV park (near Mt.Rainer) there is going to be a gathering of RBV (Ranger based Vehicles)