Fiesta del Sol - Free today

Weekend music festival Fiesta del Sol closes today, Sunday, June 6, with concerts booked by Belly Up, between South Sierra and Acacia avenues Fletcher Cove in Solana Beach. 

The most comprehensive info I found on the annual event is a press release from the Green Chamber of San Diego County.

Find the backwards (the schedule starts with the last set of the day) band line-up at the Fiesta Web site, as well as details on how to get there - you can buy two-for-one COASTER tickets to get there.