During Railroad Earth’s set at Phoenix, AZ’s McDowell Mountain Music Festival over the weekend, the band was joined by past collaborator Warren Haynes as the guitarist was on-hand to play with Gov’t Mule.

Railroad welcomed out their Ashes & Dust bandleader for a few tunes towards the end of their set including “Addin’ My Voice” and “The Forecast” before they closed the set without Haynes on “Like a Buddha.”

Haynes and Railroad Earth collaborated on 2015’s Ashes & Dust as the guitarist enlisted the bluegrass outfit to back him on a collection of acoustic songs he wrote. They then hit the road for a brief run of shows together.