The 2015 racing season will be the sixth for the Holley Iron Man Series, and the biggest and boldest schedule yet is in place for the popular series featuring USRA Stock Cars and USRA B-Mods.

USRA Weekly Racing Series results for Friday, Sept. 5, from the Rapid Speedway in Rock Rapids, Iowa.

USRA Weekly Racing Series results for Friday, Aug. 22, from the Rapid Speedway in Rock Rapids, Iowa.

USRA Weekly Racing Series results for Friday, Aug. 15, from the Rapid Speedway at Rock Rapids, Iowa.

The Rapid Speedway in Rock Rapids, Iowa, will host a USRA Stock Car special paying $1,000 to win on Friday, Aug. 15.

USRA Weekly Racing Series results for Friday, Aug. 8, from the Rapid Speedway in Rock Rapids, Iowa.

USRA Weekly Racing Series results for Friday, Aug. 1, from the Rapid Speedway in Rock Rapids, Iowa.

Justin Arends, Chris Huisman and Dylan Fitzpatrick were the winners in USRA Weekly Racing Series competition Friday night at the Rapid Speedway.

Friday night's USRA Weekly Racing Series action at the Rapid Speedway saw Randy Brands capture the USRA Stock Car feature win, with former USRA Stock Car national champion Rich Gregoire coming home second.

USRA Weekly Racing Series results for Friday, June 13, from the Rapid Speedway in Rock Rapids, Iowa.

Defending USRA B-Mod Iron Man Challenge champion Cory Crapser captured his third checkered flag of the season Friday night at the Rapid Speedway while Elijah Zevenbergen became the fourth different winner in the last four USRA Stock Car main events.

The Iron Man Challenge featuring USRA Stock Cars and USRA B-Mods kicks off the month of June with a five-night fandango that starts in Central Iowa and ends in the Southeastern corner of South Dakota.