HISTORIC EVENT
California Jam II
Historic Rock Festival
EVENT OVERVIEW
About California Jam II
California Jam II was a one-day rock festival held March 18, 1978 at Ontario Motor Speedway, four years after the original California Jam.
HOW IT DEVELOPED
Event History
Contemporary music-industry coverage documented a massive all-day production at Ontario Motor Speedway. The final running order included Bob Welch, Dave Mason, Santana, Heart, Ted Nugent, Foreigner and Aerosmith, followed later by Mahogany Rush and Rubicon.
WHY HERE
Location History
The sequel returned to Ontario Motor Speedway, the same Southern California motorsports complex used for the 1974 California Jam.
BY THE NUMBERS
Attendance History
| Edition | Location | Attendance |
|---|---|---|
| California Jam II - March 18, 1978 | Ontario Motor Speedway, Ontario, CA, United States | Source-dependentContemporary Cash Box coverage placed crowd estimates between 250,000 and 300,000. |
WHO WAS THERE
Past Bands & Performers
California Jam II 1978
- Bob Welch
- Dave Mason
- Santana
- Heart
- Ted Nugent
- Foreigner
- Aerosmith
- Frank Marino & Mahogany Rush
- Rubicon
FACT CHECK
Sources & Verification
Primary source: Cash Box, April 1, 1978 / Billboard, April 1, 1978
Last verified: August 28, 2026
Class Act leaves unsupported facts out rather than estimate or invent them.