Ham radio frequencies:
Simplex on the beach is 146.460.
HWY 101 from the North... and on the beach.
The Mt Lowe repeater operates on a frequency of 147.36 Mhz. A CTCSS (PL) tone of 127.3 Hz is required to access the repeater. The repeater does transmit PL. It is located 2624 feet above sea level at Mt Lowe near San Luis Obispo. This is the W6FM repeater system.
This repeater is linked to the Williams Hill repeater which should give solid coverage from Chular, just south of Salinas, to Paso Robles. It operates on 146.73 MHz with a CTCSS of 127.3 Hz.
That's about 125 miles of HWY 101 North of Pismo!
Haven't really found much from the South.
Eric, since you're not having any luck trolling... (two strikes)
How about giving us a frequency for Southern approaches. There should be some repeaters working on Camino Cielo ridge that reach Pismo and point south of Santa Barbara.