June 21-August 30: Summertime, Summer Nights Friday night performances by classic rock performers, including Herman's Hermits, The Coasters, and Gary Puckett (free). Santa Cruz Beach Boardwalk. (831) 423-5590. www.beachboardwalk.com.
July 4-7: High Sierra Music Festival Karl Denson's Tiny Universe, Medeski Martin & Wood, Bruce Hornsby, and Leftover Salmon ($38-130). Plumas-Sierra Fairgrounds, Quincy. (510) 420-1529. www.hsmusic.net.
July 10-14: San Jose International Mariachi FestivalCelebrate Mexican culture with family activities, music, food, and vendors (free). Discovery Meadow, downtown San Jose. (408) 928-5564. www.mhcviva.org.
July 18-21: California World Music Festival Sikh vocalist Dya Singh, Blue House, Conjunto Jardin, and the Reggae stylings of Inner Visions ($20-90). Fairgrounds, Grass Valley. (530) 891-4098. www.worldmusicfestival.com.
July 21: Jazz on the Half Shell Live music, including Brazilian vocalist Lisa Silva. Hog Island oysters and other gourmet foods ($15-18). Dance Palace Community Center, Point Reyes Station. (415) 663-1075. www.svn.net/dance.
August 2-4: Reggae on the River Reggae and world music from Dub FX, Mystic, and others on the banks of the Eel River. (Three-day ticket is $100.) French's Camp, Piercy. (707) 923-4583. www.reggaeontheriver.com.
August 4-25: Petaluma Summer Music Festival Jazz musician Shane Kelly, world music from Melody of China, Men of Worth Celtic Band, The 2nd Ave. Klezmer Ensemble, and others ($6-40). Cinnabar Theater. (707) 763-8920. www.cinnabartheater.com.
August 17: JVC Jazz Festival:Chronicle Pavilion at Concord. (925) 363-5701.
August 22-24: Nadine's Wild Weekend Celebrating Bay Area music at various locations throughout San Francisco. (415) 759-4200. www.nadineswildweekend.com.
August 24-25: Cotati Accordion Festival Accordions play Tex-Mex, Irish, jazz, and classical music ($10-18). La Plaza Park. (707) 664-0444. www.cotatifest.com.
August 25: Ozzfest 2002System of a Down, P.O.D., Adema, and others take to the stage. Shoreline Amphitheater. (650) 962-1000.
August 25: Jamgrass 2002The Sam Bush Band, David Grisman Quintet, and others. Mountain Winery Saratoga.