Jason Isbell and The 400 Unit brought their ongoing fall tour to Colorado’s Red Rocks Amphitheatre on Tuesday. The country-rock outfit treated fans to 19 songs throughout the evening, which also included some onstage collaborations with the show’s support act, David Crosby, during both the opening and headlining sets.

Related: Jason Isbell And The 400 Unit Bring Fall Tour To The Capitol Theatre [Videos/Photos]

The first sit-in of the night came during Crosby’s opening performance when he welcomed Isbell to join him and his band in their rendition of “Wooden Ships”. The guest appearance marked the second time the two have played the older song together, as they’d played the song penned by Crosby, Stephen Stills, and Jefferson Airplane’s Paul Kantner at Newport Folk Fest in 2018. The festival performance was ultimately released as an official live recording a few months later.

Later in the evening, Isbell welcomed Crosby to the stage during his own performance to assist on a rendition of Crosby, Stills, Nash & Young‘s “Ohio” to close out the set. Watch David Crosby join Jason Isbell and the 400 Unit on “Ohio” at Red Rocks below:

Jason Isbell and The 400 Unit with David Crosby – “Ohio” – 9/17/2019

[Video: D Ragoose]

Isbell’s tour wits The 400 Unit continues on Wednesday night at the Gerald R. Ford Amphitheater in Vail, CO. The band recently expanded their upcoming tour schedule with new dates now set for the remainder of 2019 and into 2020.

Head to Jason Isbell’s website for a full list of his upcoming tour dates, ticketing, and more information.