San Francisco Airport/San Francisco

101 North through San Francisco to Route 80 East, following signs for the Bay Bridge. Cross the Bay Bridge and continue on Route 80 East toward Sacramento and Berkeley. Continue on Route 80 East past Berkeley to the Hilltop Drive/Hilltop Auto Mall exit. (Approximately two miles prior to the Hilltop Drive exit, there will be an exit for San Pablo Avenue. Do NOT take this exit) After taking the Hilltop Drive exit, make a left at the light onto Hilltop. Continue on Hilltop Drive approximately two miles, to a light at San Pablo Avenue. Cross San Pablo Ave. At the next light (Vista Del Mar) make a left into the gate.

Marin County

Take Sir Francis Drake Blvd. East toward San Quentin. Cross the Richmond Bridge and you will be on Route 580. Take the first exit after the bridge. Go straight through the first traffic light and bear to the left. Go through second light under the Freeway. Stay on this road until you come to a traffic light at Hilltop Drive. Turn right onto Hilltop Drive, and right into Bayer HealthCare Pharmaceuticals.

Oakland

From Oakland take 880 North toward San Francisco. Highway 880 will merge with 80 East toward Berkeley. Take the Hilltop Drive exit and stay in the left lane. At the light, turn left onto Hilltop Drive. Continue down Hilltop Drive (approx. 2 miles) to light on San Pablo Avenue. Cross San Pablo Ave. At the next light (Vista Del Mar) make a left into the gate.

Sacramento/North Bay

From Sacramento/North Bay communities, take 80 West toward San Francisco. Cross the Carquinez Bridge. Take the Hilltop Drive exit and turn right onto Hilltop Drive. Continue down Hilltop Drive (approx. 2 miles) to light on San Pablo Avenue. Cross San Pablo. At the next light (Vista Del Mar) make a left into the gate.