From the North:

From I-280 south take CA-1 south towards Pacifica. 

Merge onto CA-1 south, which becomes Cabrillo Hwy/CA-1.  Stay on Hwy 1 for 8 miles

Turn left onto Marine Blvd (You'll see a Hospital Sign for Seton Medical Center). 

Turn right onto Etheldore Street.

Turn left at sign for Moss Beach Corral & Equestrian Center.

From the South:

Take CA-92 west.

Turn right onto Cabrillo Hwy/CA-1 north.  Stay on Hwy/CA-1 for 5.1 miles.

Turn right onto Etheldore (across from the Half Moon Bay Airport).