The NAPA 125 is the longest single main event to be featured at Rocky Mountain Raceways in 2007. The 125 laps on the 11-degree banking of the RMR Super Oval is approximately 47 miles of racing. The RMCS Late Models will be the only class to run 125 laps (all other classes will be based off of car count).

Example of what a RMCS Late Model car looks like:

The Rocky Mountain Challenge Series (RMCS - http://rmcsracing.com).

Twenty-seven drivers from three states (Utah, Nevada, and Idaho) have competed at RMR in the RMCS Late Model class in 2007. Saturday’s event will be their third and final visit to RMR for 2007. Both previous races were won by #9 Dave Minegar (Kuna, Idaho). At the last event, Dave Minegar was the #1 qualifier, won his heat race, and then won the main event.

Classes scheduled to compete:
Late Models, Modifieds, Super Stocks, Mini Cups, and Hornets
 

From MMP: 

TOOELE VALLEY, UTAH (August 16, 2007) – Four teams from the Daytona Prototype class of the Grand-Am Rolex Sports Car Series spent the past two days logging laps around the 4.5-mile full course at Miller Motorsports Park. The teams were testing in preparation for the series’ upcoming season finale, the Sunchaser 1000, scheduled for the weekend of September 14-15. 

The American Le Mans Series GT2 class.; Most possibly the hardest field to compete in with 11 teams in the GT2 class alone.  Utah's own Corsa Motorsports continues the fight in the ALMS 2007 season with there F430GT.  In case you are new to the Corsa team in the ALMS, click "read more" at the bottom of this article.  After the jump you'll find a great newspaper article from  by Jay Drew in The Salt Lake Tribune on Corsa Motorsports and there outing at Miller Motorsports park this year.