A collection of images from the pits, grandstands and around the Red Dirt Raceway in Meeker, Okla., prior to the Friday, May 13, event for the Summit USMTS National Championship presented by RacinDirt.

Here's a collection of USMTS sponsors and marketing partners who were on hand at the 2021 Performance Racing Industry (PRI) Trade Show, Dec. 9-11, at the Indiana Convention Center in downtown Indianapolis.

Images from the 13th Annual USMTS Nordic Nationals presented by PBM Performance Products at the Upper Iowa Speedway in Decorah, Iowa, on Sunday, May 30, 2021.

Images from the 18th Annual USMTS Southern Minnesota Spring Challenge presented by Boomtest Well Service at the Deer Creek Speedway in Spring Valley, Minn., on Saturday, May 29, 2021.

Images from the 13th Annual USMTS Rapid Rumble driven by Real Racing Wheels at the Rapid Speedway in Rock Rapids, Iowa, on Friday, May 28, 2021.

Images from the Karl Chevrolet USMTS Spring Challenge at the Karl Chevrolet Hamilton County Speedway in Webster City, Iowa, on Friday and Saturday, April 2-3, 2021.

Images from King of America X powered by Summit at the Humboldt Speedway in Humboldt, Kan., on Friday and Saturday, March 26-27, 2021.

Images from the 11th Annual USMTS Texas Spring Nationals at the RPM Speedway in Crandall, Texas, on Friday and Saturday, March 5-6, 2021.

As part of the ongoing partnership between the USMTS and Casey's, Snickers has been a sponsor of 12 different drivers over the last 12 seasons. Which one was your favorite?

Images from the 3rd Annual Chisholm Trail Showdown (Friday) and 4th Annual Grant Junghans Memorial (Saturday) at the 81 Speedway in Park City, Kansas, November 15-16, 2019.