A week after Bob Weir and Tedeschi Trucks Band collaborated at Lockn’ Festival, the two joined up once again last night in Mill Valley, CA as a part of the Sound Summit: A Benefit for the Mountain held at Mountain Theater at Mount Tamalpais State Park.

Weir joined Trucks, Tedeschi and their band on a pair of tunes, “Key to the Highway” and “Walkin’ Blues.” This was the same segment the two parties collaborated on at Lockn’ as well. Watch the performance above.

The show marks the end of a brief run for TTB as they will break from the road for a week before returning on September 25 for a multi-night run at the Beacon Theatre that includes openers Los Lobos, Charles Bradley, and Scraptomatic.