Trail Running calendar near Bay City 2025-2026

Summer Trail Fest Ultra at Sleepy Hollow State Park in Laingsburg, Michigan, offers three distances: 50K, Half Marathon, and 5 Mile. The course is 90% scenic, well-groomed trails with clear markings and a supportive trail community, paired..

Ode to Laz in Holly MI is a Last Person Standing backyard ultra where runners repeat a 4.167 mile loop every hour until one remains. Enjoy technical singletrack, night laps and a champion varsity jacket for the winner.