THESE DIRECTIONS ARE NOT GUARANTEED. SUPPLEMENT THEM WITH A MAP.
I-5 South for a little over 2 hours (if you are averaging about 65 mph). Take Santa Nella exit onto Route 152 West (this exist will be right after a sign for the Los Banos exit. The Los Banos exit is a few exist past the Santa Nella exit) There is a sign about 5 miles or so (very rough estimate) after this turnoff that points to Gilroy...head to Gilroy Take Route 156 toward Hollister.
Take Route 25 (I think that is the Route #) through town of Hollister.
Follow the great signage to the Hollister SVRA. Hollister SVRA is on Cienega Road.
NOTE: Races may be held at the 'second' entrance. It is past the first main entrance. I think the second entrance is to the 'North Ranch', but I am not sure.