AT THE ARBORETUM

Folk Music Jams — Pull out your fiddles, guitars, mandolins, penny whistles, pipes, flutes, squeezeboxes — you name it! — and join your fellow musicians during the lunch hour for a little bluegrass, old-time, blues, Celtic, klezmer and other world music. All skill levels welcome. Listeners, too! Noon Aug. 6 and 20, Wyatt Deck.

Tour — An Oak Oasis in August. The arboretum's oak collection, one of the largest in the nation, makes for a shady place in summer. On this walk along the new Oak Discovery Trail, your guide will discuss oak ecology and the importance of oaks in human culture through time and around the world. 10 a.m. Aug. 14, gazebo.

All events are free and open to the public. More information: (530) 752-4880 or arboretum.ucdavis.edu (for directions, click on “Plan Your Visit”).