Warren Haynes sat in with Leftover Salmon during their performance at Cumberland, MD’s DelFest on Sunday evening. The Gov’t Mule and Allman Brothers Band guitarist emerged during Salmon’s encore for a cover of Neil Young’s classic “Down By The River.” Leftover Salmon had performed Young’s Harvest in its entirety as the meat of their set. Gov’t Mule served as the evening’s headliners.

Leftover Salmon will perform at Grand Rapid, MI’s Founders Fest on June 17.