Directions to Purissima
  - go north on I-280
  - Exit on Sandhill Rd - West (ie, left, towards the hills)
  - right turn onto Portola Rd. (about 2-3 miles from I-280)
      NOTE: Portola Road veers left about 0.5 miles from Sandhill Rd. make sure you
                veer left or you'll end up on Mountain Home headed back to Woodside
  - left turn onto La Honda Rd (about 1.5 miles from Sand Hill Rd)
     this is a sharp left turn so be careful
  - Continue up the hill to Skyline (aka Hwy 35)
     there will be a stop sign and country store on right side.
  - Right turn at Skyline and continue for 7-10 miles
  - Gate PC01 is on left side, next to a country store approx 4-5 miles past Skegg's Point