USRA American Racer Modified Series

Due to an increasingly unfavorable weather forecast across eastern Oklahoma for the upcoming weekend, event organizers and race officials have announced the postponement of the 2026 Joe Duvall Funkadelic Dirt Track & H***y Tonk Extravaganza.

Joe Duvall’s Funkadelic weekend will now shift to the reserved rain dates Friday July 17th and Saturday July 18th as indicated on our original schedule release.

Duvall's Funkadelic Postponed to July 17 & 18, 2026 Grain Valley, MO (May 20, 2026) - Due to an increasingly unfavorable weather forecast across eastern Oklahoma for the upcoming weekend, event organizer Joe Duvall along with officials with the USRA Am