August 29, 2026
Thunder Bay Thriller
Alpena, MI, USA · Rock CF Foundation
Routes
15 mi
15 mi · $35 entry
31 mi
31 mi · $50 entry
65 mi
65 mi · $70 entry
100 mi
100 mi · $88 entry
Lodging
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Event details are provided by the organizer. Gravel Calendar LLC is not responsible for their accuracy. Please participate at your own risk.
Registration
- Opens
- December 8, 2025
- Deadline
- August 29, 2026
Event organizer
https://letsrockcf.org/thunder-bay-thrillerKeep looking
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