gravel
✓ Verified Active Listing
Thunder Bay Thriller
🧬 Course DNA & Technical Intel
📏 Primary Distance
100 mi
🛞 Recommended Tire
38mm – 42mm Tubeless
🚴 Discipline
gravel
🏁 Course Distance Options
65-Mile Open
65-Mile Athena
65-Mile Clydesdale
65-Mile Fat Bike
65-Mile Single Speed
65-Mile Tandem
31-Mile Open
31-Mile Athena
31-Mile Clydesdale
31-Mile Fat Bike
31-Mile Single Speed
31-Mile Tandem
15-Mile Open
15-Mile Athena
15-Mile Clydesdale
15-Mile Fat Bike
15-Mile Single Speed
15-Mile Tandem
100-Mile Open
100-Mile Athena
100-Mile Single Speed
100-Mile Clydesdale
100-Mile Fat Bike
100-Mile Tandem
Virtual Rider
Volunteer
About Thunder Bay Thriller
Official registered gravel event in Alpena, MI. Direct registration on BikeReg.
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⚙️ Recommended Pro Hardware for Thunder Bay Thriller
Top-rated power meters, radar, and GPS computers curated by Threshold Cycling.
Dual-Sided SPD Accuracy
View Product Specs ↗
Favero Assioma Pro MX-2 Power Meter Pedals
$759.00
±1% real-world power accuracy, seamless Bluetooth/ANT+ connectivity, and full rock strike durability designed specifically for gravel epics.
Backcountry Safety
View Product Specs ↗
Garmin Varia RTL515 Radar Tail Light
$199.99
Detects approaching vehicles up to 153 yards away with visual and audible cockpit alerts on your GPS computer. Vital for remote rural gravel roads.
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