Key notes: The MARS Late Model Championship Series concludes its doubleheader weekend with Saturday’s 40-lap, $5,000-to-win Charleston Challenge. … It’s the second-ever MARS Series visit to Charleston Speedway after points leader Ryan Unzicker won $5,000 on May 20, 2023. Unzicker, of El Paso, Ill., also topped an American Late Model Series visit there in May of 2013, worth $2,000. … Jason Feger of Bloomington, Ill., led all but six laps of Friday’s weekend opener at nearby Farmer City (Ill.) Raceway in the 16th annual Jr. Kimler Memorial. He also won $2,000 at Charleston in July of 2009 on the now-defunct Monster Midwest Series. … Feger leads all drivers with three MARS Series wins this season while Unzicker has two. … Modifieds ($2,000-to-win), pro mods, hornets and Crown Vics are on the undercard. … Pits open at 2 p.m. and grandstands open at 4 with hot laps at 6. … Watch live on FloRacing.

Who to watch: Jason Feger of Bloomington, Ill., seeks the MARS weekend sweep after winning Friday at Farmer City.

Points chase: Before Charleston: 1. Ryan Unzicker (627); 2. Jason Feger (539); 3. Dylan Thornton (521); 4. Daniel Adam (453); 5. Tanner English (437).

Expected entrants: Jason Feger, Ryan Unzicker, Tanner English, Mike Spatola, Frank Heckenast Jr., Dylan Thornton, Bob Gardner, Jake Little, Aaron Marrant, Daniel Adam, Jeffrey Ledford, Rich Bell, Caden McWhorter, Myles Moos, Zach Taylor, Kevin Weaver, Austin Howes, Eli Johnson, Donny Walden, Roben Huffman, Timmy Dick, Cam Gardner, Mark Voigt and others.

Current weather: Clear, 79°F

Next series race: August 7, Sycamore Speedway (Maple Park, IL) $5,000