Sunday, August 18, 2019 - Cuyuna Crusher Race Day! The Minnesota Series Race takes place in the Mahnomen Unit of the Cuyuna Country State Recreation Area on Sunday, Aug. 18. Registration begins at 8:00 a.m. and is open to all interested racers! Voted Best Race in 2015, 2017, & 2018! Cuyuna's World Famous Red Dirt Flow Trails are in great shape!