Three hours northwest of Detroit, the country's greenest festival is powered by biofuels, features a Think Tank climate-change symposium, and is nestled in the woods near Lake Michigan. Of some 40,000 fans, 3,500 rise with the sun for early-morning yoga.
Don't Miss Bob Dylan, the Dead, Brett Dennen, Cold War Kids, and—could you get more patriotic?—a possible July 4 appearance by Willie Nelson. Four days, $250; rothburyfestival.com.
Intermission Catch smallmouth bass or trout on the Muskegon (two people, $350 per day; streamside­guideservices.com).
Also This Weekend 80/35, Des Moines, Iowa.