The USAC AMSOIL Sprint Car National Championship will headline two Midwest dirt events this spring: the Avanti Windows & Doors Corn Belt Clash Night #1 at Knoxville Raceway in Knoxville, Iowa, and a two-night stop at Eldora Speedway in Rossburg/New Weston, Ohio. Both venues are half-mile dirt ovals, and Eldora is scheduled for Friday–Saturday, May 15–16 as part of the #LetsRaceTwo weekend. Knoxville details conflict across sources: Source 1 lists the Knoxville card on May 29 with 360 winged sprints and a $10,000 winner payout, while Source 2 lists May 30 with 410 winged sprints and a $15,000 winner payout. Both sources agree the Knoxville program is co-sanctioned by the USAC Midwest Racing Association, list pits opening at 3:30 p.m. CT and gates at 5:30 p.m. CT, and describe two-lap qualifying and heat races with a possible 10-lap C-Main and 12-lap semi leading to a longer feature; Source 1 describes a 25-lap feature with inversion rules to set front rows and a 24-starter field, and Source 2 describes an 8-lap heat format with a top-6 inversion and a 30-lap feature that starts 24 cars using defined transfer procedures. Because the date, car class and winner payout conflict between sources, verify final details with the track or USAC.

Eldora details are consistent across sources: gates open at 4:00 p.m., hot laps begin at 6:00 p.m. and racing starts at 7:30 p.m. each night. The USAC format at Eldora is two-lap qualifying, inverted heat races and a 30-lap feature with 24 starters. Kirk Spridgeon is listed as race director for Eldora, and Eldora’s winner payout is listed at $12,000.

Common prize, points and entry information is the same for both events: the event winner will receive 70 championship points, and payouts and points will be paid through 24th place. Entry fees are $30 for USAC members and $40 for non-members, with USAC membership required to earn championship points and contingency awards. Advance tickets are available at KnoxvilleRaceway.com; Eldora advance prices list general admission $35 and reserved $40 for ages 14+, with children pricing noted, and Eldora pit passes are $45 per night or $90 for two days. Both events will be streamed live on FloRacing, with live audio available via the USAC app and Mixlr and live timing via MyRacePass and Race Monitor; the mandatory driver radio frequency is reported as 464.5500.

Sources