Drivers in the two open-wheel divisions are locked in tight battles with razor-thin margins that will come down to the final night of racing while the leaders in the two full-fendered divisions have simply to wait until Oct. 20 to be crowned USRA national champions.

After rain thwarted the Sept. 28 event, the season-ending blockbuster for the Iron Man Challenge will now take place on Saturday, Oct. 12, at the Upper Iowa Speedway in Decorah, Iowa.

A new season-ending blockbuster for the Iron Man Challenge will take place on Saturday, Sept. 28, at the Upper Iowa Speedway in Decorah, Iowa.

USRA Iron Man Challenge results for Thursday, July 4, from the Upper Iowa Speedway in Decorah, Iowa.

Up next for the Iron Man Challenge will be a tripleheader featuring both USRA Stock Cars and USRA B-Mods at three tracks in Southern Minnesota and Northern Iowa on Thursday, Friday and Saturday, June 6-8.

Officials at the Upper Iowa Speedway have unveiled the 2013 schedule of events for the quarter-mile clay oval.

Officials from the United States Racing Association have released the 2013 schedule for the USRA Iron Man Challenge featuring USRA Stock Cars and USRA B-Mods.

The USRA Stock Cars and USRA B-Mods teamed up again Saturday night for a big show at the Upper Iowa Speedway in Decorah, Iowa, for the Industrial Material Surplus Iron Man Challenge with Mitch Hovden and Jason Schlangen taking down the wins.

The Industrial Material Surplus Iron Man Challenge returns to action with a pair of events this Saturday and Sunday, Aug. 18-19, featuring both the USRA Stock Cars and USRA B-Mods on the ticket.

Trevor Hunt backed up his win on Friday at the Highway 3 Raceway with his second straight USRA B-Mod main event win Saturday night as the Industrial Material Surplus Iron Man Challenge invaded the Upper Iowa Speedway in Decorah, Iowa.

The month of June will end with a bang as four events in five nights are on tap for the Industrial Material Surplus Iron Man Challenge.

Officials from the United States Racing Association have released the 2012 schedule for the popular USRA Iron Man Challenge featuring USRA Karl Chevrolet Stock Cars and USRA Karl Performance Parts B-Mods.