Speedworld Raceway in Roseville, California (near Sacramento) is hosting a 5 race VTA series this fall, and will include one series race with a 30-minute enduro style main. USVTA rules.
Race flier:
http://www.speedworldraceway.com/Fil...l_vta_2011.pdf
Speedworld is an outdoor asphalt permanent track with a 160' main straight, covered pits, covered drivers stand, and has hosted the Reedy race of champions - a first class facility!
More information can be found at
www.speedworldraceway.com.