Six 16.6-mile figure-eight loops through the Pinckney Recreation Area, run inside the full-blown music-and-camping festival of Run Woodstock. A legitimate Western States 100 qualifier and the 4th leg of the Midwest Grand Slam of Ultrarunning, wrapped in tie-dye and peace signs.
Quick facts
- Location: Run Woodstock festival grounds, Pinckney Recreation Area, Gregory, MI (start/finish)
- Date: September 11–13, 2026, 2:00 PM Friday start
- Distance: 100 miles — six 16.6-mile figure-eight loops
- Website: runwoodstock.com
- Contact: Via contact form at runwoodstock.com — organized by RF Events
- Registration: Via the race website. A Western States 100 qualifier and the 4th leg of the Midwest Grand Slam of Ultrarunning.
Course description
Six repeats of a 16.6-mile figure-eight loop through the Pinckney Recreation Area, mostly well-maintained singletrack through wooded terrain, following sections of the Potawatomi Trail and connecting to the Border-to-Border and Waterloo-Pinckney trail network, broken up by a few stretches of open two-track jeep road and a handful of paved-road crossings. Excellent course marking keeps runners on track even as five other race distances share sections of the same trails throughout the weekend. The race has an unusually late Friday 2:00 PM start, meaning 100-mile runners hit the night portion of the race relatively fresh before facing a full second day on tired legs.
Elevation change
Roughly 1,300–1,500 feet of gain per 16.6-mile loop, or approximately 8,000–9,000 feet of cumulative climb across all six loops — rolling Michigan terrain rather than any sustained or technical climbing.
Aid stations
Three aid stations serve the loop: the start/finish area with a large sheltered drop-bag and changing tent, a station visited twice per loop, and one visited once — all well-stocked, with bug spray on hand at every stop for the area’s notable mosquito population. Volunteers and runners doing the shorter festival distances share the trail and are known for cheering on the 100-milers throughout the event.
Special conditions & average temps
Mid-September in southern Michigan is generally mild, but the course has seen everything from pleasant, dry conditions to prolonged, heavy overnight rain that turns the singletrack muddy and slick — past runnings have seen finish rates drop sharply in wet years. Mosquitoes are a near-constant presence in the wooded sections; repellent is provided at every aid station.
Recent results — top 3, men & women
2025
- Men: 1. Brian Papay 20:22:17 · 2. Peter Rosenblad 20:51:00 · 3. Matthew Jungers 21:23:40
- Women: 1. Brenda Johnson 19:05:27 (overall winner) · 2. Jamie Harcar 22:25:31 · 3. Lily Medina 22:35:20
2024
- Men: 1. Christopher Veska 15:53:02 · 2. Alec Cline 17:57:06 · 3. Abe Kane 18:03:34
- Women: 1. Brenda Johnson 19:57:17 · 2. Beverley Anderson-Abbs 20:29:38 · 3. Laura Ricci 20:47:44
2023
- Men: 1. Christopher Veska 17:00:34 · 2. Charles Hornburg 18:23:58 · 3. Nicholas Kopp 18:37:10
- Women: 1. Stacey Crosby 21:17:14 · 2. Angela Wyse 22:41:21 · 3. Brittney Yuronich 22:58:24
Registration deadline & how to get in
Registration is handled through the race website; check for the current field cap and pricing tiers ahead of race weekend. No qualifying race is required to enter, and Hallucination itself is a Western States 100 qualifier and the 4th leg of the Midwest Grand Slam of Ultrarunning, run inside the full Run Woodstock festival of camping, live music, and themed side events.
Traveling to this race? Find lodging near the venue via Hotels.com.