For the upcoming summer solstice, Phil Lesh has scheduled a special Telstar set, enlisting Scott Law, Ross James, Alex Koford and Holly Bowling for a spaced-out, improv-heavy performance at Terrapin Crossroads.

Telstar originated in April 2008 when Phil Lesh & Friends performed a wild set of exploratory jazz at NASA’s Ames Research Center. Since then, Lesh has used Telstar as an umbrella term for his more “out-there” offerings.

Telstar: Summer Solstice will take place on Friday June 22 at Terrapin Crossroads in San Rafael, Calif.

Tickets are available here.