From East Bay/Oakland, CA:

- Take I-580 W toward San Francisco
- Merge onto US-101 N
- Take the exit toward River Rd/Guerneville
- Turn left onto Mark West Springs Rd
- Mark West Springs Rd becomes River Rd
- End at 12866 River Rd

From San Francisco, CA:

Take US-101 N
- Take the exit toward River Rd/Guerneville

- Turn left onto Mark West Springs Rd
- Mark West Springs Rd becomes River Rd
- End at 12866 River Rd

From South Bay/San Jose, CA:

- Take I-880 N toward Oakland
- Keep right to take I-980 E toward CA 24/Walnut Creek
- Merge onto I-580 W toward San Francisco
- Merge onto US-101 N
- Take the exit toward River Rd/Guerneville
- Turn left onto Mark West Springs Rd
- Mark West Springs Rd becomes River Rd
- End at 12866 River Rd