From San Francisco:
Highway 280 South (or 101 south from S. F. Airport)
To Hwy 85 South to Gilroy
To Hwy 17 South toward Santa Cruz
*Follow the rest of the directions below

From Oakland:
Highway 880 South toward San Jose
After you cross highway 280, the road becomes Hwy 17 South
*Follow the rest of the directions below

From San Jose:
Highway 880 South, Highway 280 North, or Hwy 85 North to Hwy 17 South
*Follow the rest of the directions below

From Livermore and Farther East:
Hwy 680 South toward San Jose
Pass Hwy 101 and the road becomes Hwy 280 North
To Hwy 17 South toward Santa Cruz
*Follow the rest of the directions below

From Gilroy:
Hwy 101 North to Hwy 85 North
Exit Hwy 17 South toward Santa Cruz
*Follow the rest of the directions below

From Santa Cruz:
Hwy 17 North to Bear Creek Road Exit
Turn right at stop sign (away from Reservoir)
*Follow directions below, but turn right at stop sign and up Bear Creek Road.