Two-stroke day at Valley Raceway in Crystal Falls: the U.P. 2-Stroke Championship round of the Superior MX Series, run on the mile-long national style sand track. Gates open Friday at noon for the weekend and 6 AM Saturday. Spectators $10, entries about $35 a class, camping $20 a night. Part of the Superior MX Series, the AMA-sanctioned championship linking the northernmost motocross facilities in Michigan's Upper Peninsula and northern Wisconsin. Founded in 2021, the series draws 300 to 500 entries per round across four venues: Valley Raceway, X-Mas Motorsports Park, Range MX, and Pine Ridge Raceway. AMA and District 16 memberships are required for race weekends and must be purchased online in advance. Classes, rules, points, and contingency info at superiormxseries.com.