Set against Michigan’s forest trails and lake country, the Run Woodstock Hallucination combines ’60s counterculture vibes with serious ultrarunning. This groovy weekend serves as the fourth leg of the Midwest Grand Slam of Ultrarunning and qualifies finishers for Western States 100, making it both a cultural celebration and a legitimate stepping stone to ultrarunning’s biggest stages.

The flagship 100-mile and 100K events kick off Friday afternoon on a challenging 16.6-mile loop system. The 100-mile requires six loops while the 100K covers four loops with shortcuts. Each loop delivers approximately 1,500 feet of elevation gain through Michigan’s rolling terrain of dirt singletrack, forest paths, and brief beach sections. Saturday brings the 50-mile, 50K, marathon, and half-marathon distances on variations of the same course.

Aid stations appear every 4-5 miles on ultra distances, stocked with traditional fare plus evening pizza for the long-haulers. Both century events allow 30 hours to complete the distance. The weekend atmosphere perfectly balances serious racing with laid-back festival vibes, complete with camping, live music, and yoga sessions.

Awards reflect the event’s dual nature: 100-mile finishers earn coveted belt buckles alongside peace sign medals, while Saturday night’s theme awards celebrate the “Hippest Hippies,” best campsites, and most authentic vintage vehicles. The combination of Western States qualification potential with weekend-long festival atmosphere creates an experience where competitive goals and community celebration coexist naturally.

The event benefits Washtenaw Promise, supporting local education initiatives while runners chase personal records through Michigan’s beautiful trail systems.