Shake & Brake Gravel Race
📍 Alabama, USA
gravel
Date
27 June 2026
Distance
54.3 mi · 33.6 mi
Elevation
1,620 m
Difficulty
gravelbeginner friendly
Thunder Bay Thriller
Northeast Michigan, USA · 29 August 2026
Difficulty: 3/5 — Hard
The Thunder Bay Thriller offers multiple gravel distances from 15 to 100 miles through scenic Northeast Michigan, featuring a mix of rolling gravel roads, two-track, and some sandy sections. Riders can expect a challenging yet fun experience on varied terrain, suitable for gravel bikes with wider tires or mountain bikes.
Visit official site →- Distances
- 161km · 105km · 50km · 24km
- Surface
- gravel, dirt, singletrack
- Typical W/kg
- 2.5–3.8
Rider fit
Who it's for
This event caters to a wide range of gravel enthusiasts, from beginners seeking a shorter, scenic ride to experienced ultra-distance riders looking for a significant challenge.
Who will struggle
Riders unprepared for mixed-surface riding, including potential sand and rougher two-track sections, or those with inadequate tire choice (less than 38c), may find parts of the course demanding, especially on longer distances.
Training focus
Training should emphasize long endurance rides for the longer distances, incorporating off-road skills practice on gravel, dirt, and varied single/two-track to handle the diverse terrain and occasional sandy patches.
Are you ready for this race?
Compare your W/kg to see how you stack up against this race's typical level — and which races fit you best right now.
FAQs
What are the available race distances?+
The race offers four distances: 100 miles (161km), 65 miles (105km), 31 miles (50km), and a new 15-mile (24km) option.
What kind of terrain can riders expect?+
The course features a multi-surface route including rolling gravel backroads, snowmobile two-track, single/two-track through the woods, and some sections with sand, particularly on the back trails.
What tire size is recommended for this race?+
A minimum tire width of 38c is recommended, and while a gravel bike is suitable for the entire course, a mountain bike can be used for added comfort on the trails.
When and where does the race start?+
The race is scheduled for August 29, 2026, starting at Thunder Bay Jr High in Alpena, MI 49707. Staggered start times are 7:00 am for 100-mile, 8:00 am for 65-mile, 8:20 am for 31-mile, and 8:40 am for 15-mile.
Are there different categories and awards?+
Yes, awards are given for top men, women, and age groups across all distances. Additional categories include nonbinary, single speed (SS), Fat bike, Clydesdale, Athena, and Tandem.
Does this race support a charity?+
Yes, 100% of all proceeds from the Thunder Bay Thriller benefit the Rock CF Foundation, a non-profit dedicated to supporting individuals living with cystic fibrosis.