The Travelin’ McCourys and Jeff Austin debuted their Grateful Ball show earlier this summer in St. Louis and just recently expanded the project into a tour, and now that tour will be punctuated by a performance “333’ below” with Bluegrass Underground on October 29.

Both band will perform full sets by themselves before combining for a set of all Grateful Dead music. On the same say, the venue will also host an afternoon Del & Dawg collaboration featuring Del McCoury and David “Dawg” Grisman.

Pre-sale for the Grateful Ball will begin this Thursday, July 21, at 10am CST, with general ticket sales beginning July 23. Fan who purchase tickets to the Del & Dawg performance here before tomorrow, July 20, at 5pm CST will receive a special code to get early access to discounted tickets to the Grateful Ball.