More Summerfest 10 p.m. Headliners
Keller Williams, Yonder Mountain String Band, O.A.R.
Bluegrass traditionalists might not find much to love, but Yonder Mountain String Band are at the forefront of a movement of young acts whose flashy playing and cocky chord progressions have brought a new, Relix-reading audience to the genre. The group brings their mandolins and banjos to the Briggs &Y Stratton Big Backyard for a 10 p.m. show.
Jammy roots-rockers O.A.R., a perpetual favorite on college campuses and among tape-traders, headline the Harley-Davidson Roadhouse tonight at 10 p.m. The guys distinguish themselves from similar jam bands by throwing in the occasional, straight-forward ska riff.