Thunder Bay Gravel Thriller
Michigan Gravel Race Series
Sep 14, 2025
Alpena, MI
Gravel
About
Challenge yourself on Michigan's thrilling multi-surface gravel adventure!
The Thunder Bay Gravel Thriller is a multi-surface gravel race set in Northeast Michigan's scenic countryside and trail systems. Taking place on September 14, 2025 in Alpena, MI, the event is part of the Michigan Gravel Race Series and offers three course distances (62, 27, and 16 miles) with challenging terrain, including gravel backroads, snowmobile two-track, and wooded trails. The race welcomes all levels of riders, features new categories for 2025, and supports Rock CF's charitable mission.
COURSE DETAILS
Choose from 62-mile, 27-mile, or 16-mile courses, all starting and finishing at Thunder Bay Jr High, traversing rolling gravel roads, snowmobile two-track, and forested trail sections like the Norway Ridge Pathway and Alpena-Hillman Trail.
Race HIGHLIGHTS
- Scenic route through Devils Lake and Norway Ridge Pathway forests
- New Clydesdale/Athena categories for 2025
- Part of the Michigan Gravel Race Series (new in 2025)
- Multiple distances for all rider levels
- Finish line festival at Thunder Bay Jr High
RIDE TYPES
Race overview
62 miles (full), 27 miles (short), 16 miles (mini)
Alpena elevation: ~180 ft above sea level / Elevation gain: Unspecified (features rolling hills and technical sections)
Multi-surface: gravel backroads, snowmobile two-track, wooded single/double-track trails