Guerilla Union has announced the return of the second annual Dr. Greenthumb, Tommy Chong and Snoop Dogg’s SPRING GATHERING Music Festival and Medical Marijuana Expo powered by Weedmaps, taking place on Saturday, June 11 at the NOS Events Center in San Bernardino, CA. In 2010, SPRING GATHERING established itself as a premier lifestyle destination celebrating music and activism. The second installment will feature a powerful line-up that continues to perfectly blend the worlds of music and cannabis culture. SPRING GATHERING 2011 will feature live performances by SNOOP DOGG, CYPRESS HILL, TRAVIS BARKER WITH MIX MASTER MIKE, STEPHEN MARLEY, COLLIE BUDDZ plus more to be announced. SPRING GATHERING’S ambassadors, Dr. Greenthumb (B Real of Cypress Hill), Tommy Chong, Snoop Dogg and special guest Shelby Chong, will host the day-long festivities.