Xtreme R/C Raceway offroad (link in sig) in Quarryville, PA runs the 1/8 e-buggy with 1/8 nitro. Nice track. Blue Diamond is also a good track, go there occasionally.
For indoor onroad this winter, I run at the Mushroom Bowl. We run 1/12, 1/10 TC (foam or rubber), micros and HPI cup racers.