From San Francisco International Airport (SFO):

1. Start going toward T-1 TURNAROUND
2. Take Left ramp onto US-101 S toward SAN JOSE - go 24.7 mi
3. Take exit #397/ELLIS STREET onto ELLIS Street
4. Turn Right on NATIONAL Avenue
5. Arrive at 615 NATIONAL AVE, MOUNTAIN VIEW, on the Right
   

From San Jose International Airport (SJC):

1. Head southeast on Airport Blvd
2. Turn left to stay on Airport Blvd (signs for Downtown/CA-87/US-101/Airport Pkwy/Terminals/Skyport Dr/Rental Cars)
3. Take the Skyport Dr ramp on the left to Downtown/CA-87/US-101
4. Keep left at the fork to continue toward CA-87 N/Guadalupe Pkwy and merge onto CA-87 N/Guadalupe Pkwy
5. Take exit 9B on the left to merge onto US-101 N toward San Francisco
6. Take the Ellis Street exit
7. Turn left at Ellis Street
8. Turn right at National Avenue
9. We are at 615 National Avenue
   Mountain View, CA 94043, USA