Exiting the airport, turn right on hegenberger RD. Follow to the I-880 North/Downtown Oakland on ramp, merge on. Drive 9.5 miles to I-580West/I80 East on ramp towards Berkeley-San Rafael, merge on and follow I-580West 18 miles to the Richmond - San Rafael Bridge. Go over the bridge and follow signs to Hwy 101 North, merge and drive 30 miles to the Hwy 116 W/Rohnert Park/Sebastopol exit. Take this off ramp, at the light make a left onto Hwy 116/ Gravenstein Hwy West. You will be on Gravenstein Hwy for 8 miles and we are located on the right.