Rivercity Manufacturing sponsored the 3rd Annual Rivercity Rumble featuring a $1,000 paycheck to the USRA Karl Performance Parts B-Mods Saturday night at the Mississippi Thunder Speedway.

The Iron Man Challenge roared into the Mississippi Thunder Speedway in Fountain City, Wis., Friday night with Justin Temeyer and Jake Timm topping the main events for their first wins of the season.

Ten races are in the books, and now the drivers seeking the 2011 Iron Man Challenge crowns head to familiar territory and new frontiers at the Cresco Speedway this Thursday, Aug. 4, and Mississippi Thunder Speedway on Friday, Aug. 5.

Bob Timm was in pure form taking the win in the USRA RHS Modified feature while Ben Anderson tallied another win in the USRA Karl Performance Parts B-Mods.

Shaun Walski topped a nail-biter in the USRA Karl Performance Parts B-Mod feature over youngster Parker Hale. Lucas Schott hit his marks and not only won his first feature at the track in the USRA RHS Modified division, but he also made it a clean sweep.

In a $500-to-win show for the USRA Karl Performance Parts B-Mods, a field of 21 cars vied for the big check from Baehman Law, but before the green they would see a lot of yellow.

Drew Lawson turned his ninth place starting spot into his first USRA Karl Performance Parts B-Mod feature win at Mississippi Thunder Speedway while Josh Angst took down the field in the caution-free USRA RHS Modified feature.

While rain forced cancellations at nearly all regional tracks Friday night, the Mississippi Thunder Speedway in Fountain City was spared the showers. Eighty-five cars checked into the pits to provide the action.

Keith Foss turned the tables from last week to take in a clean sweep in the USRA RHS Modifieds at the Mississippi Thunder Speedway Fiday night while Ben Anderson topped the 19-car field of USRA Karl Performance Parts B-Mods.

Josh Angst tallied a clean sweep in the USRA RHS Modifieds while Troy Hovey made the pass to steal the win from Ben Anderson in the USRA Karl Performance Parts B-Mod feature.

Keith Foss nipped Ben Mattick in the final turn Friday to score the opening night USRA RHS Modified win at the Mississippi Thunder Speedway in Fountain City, Wis.

Mississippi Thunder Speedway will officially kick off the third season of action at what is quickly becoming one of the hottest speedways in the Upper Midwest with the 2nd Annual Mississippi Thunder Speedway car show.