Solar Impulse, an ultralight plane powered completely by the sun, will kick-off its coast-to-coast flight across the U.S. from Moffett Airfield in Mountain View on May 1.

Starting March 1, the agency that operates Muni will offer free service to low and moderate-income youth who live in San Francisco.

After a two-year hiatus, the Mavericks Invitational surf contest captivated Half Moon Bay residents Sunday. The contest attracts surfers from across the globe who compete for $50,000.

Clipper card activity, including when and where passengers board and disembark, is kept in a transit agency’s database for seven years after the account is closed.

Sonoma County, part of California’s wine country, kicked off its annual fair in Santa Rosa in July. The 17-day event runs until August 12.