When does summer really start? Technically, the 2012 summer solstice arrives at 7:09 p.m. on June 20. But some local music fans might argue that it begins tonight at 8 p.m. when Wolf Trap National Park for the Performing Arts kicks off its summer concert season.

Okay, okay. So it’s a Garrison Keillor gig. But there’s still plenty of great music coming to the Trap in the approaching weeks, including performances from folk legends Crosby, Stills & Nash, country icon Alan Jackson, a double bill featuring Bonnie Raitt and Mavis Staples, and on Aug 24., the Reverend Al Green. Maybe he’ll do his Obama impression?

For a full, printable Wolf Trap summer concert schedule, click here.

Crowds on the Lawn at Wolf Trap's Filene Center on July 22, 2011. (Tracy A Woodward/THE WASHINGTON POST)