Coming from La Jolla:
1. Head northeast on Torrey Pines Rd
2. Turn left to stay on Torrey Pines Rd
3. Turn left at North Torrey Pines Rd
4. Turn right onto La Jolla Shores Dr
5. Turn right onto Scholars Dr S and follow to parking lots

Park in the lots at the intersection of Scholars Dr S and Revelle College Dr. (Paid parking)
Walk North to "Ridge Walk" and look for Bonner Hall on your Right.

Google maps link