This suggested drive will take over 6 hours:
1.San Diego to Julian
, located in the Cuyamaca mountains. Take CA-94E, I-8E, and CA-79N. It's around 1.5 hours' drive.
2. Julian, via Temecula
in the San Jacinto Mountains. CA-79N, CA-76W, I-15N, CA-215N, and CA-74E. It will take around 2.5 hours.
3. Idyllwild (passing by Palm Desert
) to Palm Springs
on CA-74E, CA-111N. You'll drive another 1.5 hours before arriving in Palm Springs.