Key notes: The Structural Buildings WISSOTA Challenge Series continues its four-race weekend with Saturday’s 40-lap, $3,000-to-win FarmTuber Night at Ogilvie Raceway. … Cole Searing of Huron, S.D., led all 40 laps of Thursday’s opener at nearby KRA Speedway in Willmar, Minn., before leading the final 26 laps of Friday’s second round at Princeton (Minn.) Speedway. Searing also captured a $2,000 Challenge Series victory in June 2022 at Ogilvie. … Tyler Peterson of Hickson, N.D., is a two-time series winner there (2023, ’24), earning more than $4,500. … Pat Doar of New Richmond, Wis., has nine Ogilvie specials since 2019, including five straight Fall Classic victories (2020-’24), combining to collect more than $29,000 over that span. … Josh Zimpel of Braham, Minn., topped last July’s Challenge Series stop before adding last year’s Fall Classic victory in WISSOTA Late Model competition. … Fans are encouraged to meet Farming YouTube influencers Zach Johnson, Chet and Doug Larson. … Modifieds, super stocks, midwest mods, street stocks and hornets are on the undercard. … Gates open at 4 p.m. with on-track action at 6:30; a driver autograph session takes place from 4-5:30 p.m. … Watch live on Dirt Race Central.

Who to watch: Cole Searing of Huron, S.D., eyes his third straight Challenge Series victory and second career tour win at Ogilvie.

Points chase: Before Ogilvie: 1. Kevin Burdick (452); 2. Tyler Peterson (445); 3. Shane Sabraski (420); 4. Ryan Mikkelson (391); 5. Jeff Provinzino (389).

Expected entrants: Cole Searing, Kevin Burdick, Tyler Peterson, Pat Doar, Dave Mass, Shane Sabraski, Jeff Massingill, Josh Zimpel, Ryan Mikkelson, Cory Crapser, Zach Johnson, Jared Zimpel, Jeff Provinzino, Billy Kendall, Johnny Broking, Steve Laursen, Dexton Koch, Taylor Madrinich and others.

Next series race: August 16, Granite City Motor Park (Sauk Rapids, MN) $3,000