Get your blood moving before the cold comes with a short hike to the Old Grove Festival. You’re sure to be hungry after that, so join in for a great feast that’ll fill your belly. Save some room—Dan Hicks and the Hot Licks are in charge of the entertainment, alongside Solid Air, the Mighty Chiplings, and Gordan and D’Orazi. The natural starlit atmosphere adds to the magic, and sound just resonates beautifully in the crisp forest air. Gather round the amphitheater—you might want to bring something soft to sit on the wooden benches—on Saturday, Sept. 15, at Armstrong Woods. 17000 Armstrong Woods Road, Guerneville. 4pm. $25—$40. 707.869.2015.