Thunder Bay Thriller Gravel Grinder - 2025 Course
Cycling Route
Details
62.0 mi
1,790 ft
Race Date: 9/14/2025
Updated as of 4/19/24, course is subject to safety updates leading up until race date!
Big adjustment: removal of Bear Springs Road and Pine Street, now heading straight down Hubbard Lake Road to Jenison onto the Hickey Hill two track up the hill, then down Robinhood hill to Bennett. Left turn, then right turn back onto Hubbard Lake/Spruce Rd to follow course.
Next, heading straight up Kitter, cross Nicholson Hill, then left onto Gherke. Cross Spruce Rd, then head right up Indian Reserve Rd until Precour Rd. Once you tee into Spruce Rd, it will be a left, then a short ride on the shoulder until turning into Devils Lake Trail to make the route a perfect 62mi!
-Amendment: 3rd ave removal at start/finish chute. Removed about 1 mile from race course, but ensured rider safety around initial turn at start.
-Amendment: slightly adjust exit off of Wildcat Ct through side-trail to Alpena-Hillman Trail and small Norway Ridge Adjustment (using marker 12 uphill to 462 exit)
Updated as of 4/19/24, course is subject to safety updates leading up until race date!
Big adjustment: removal of Bear Springs Road and Pine Street, now heading straight down Hubbard Lake Road to Jenison onto the Hickey Hill two track up the hill, then down Robinhood hill to Bennett. Left turn, then right turn back onto Hubbard Lake/Spruce Rd to follow course.
Next, heading straight up Kitter, cross Nicholson Hill, then left onto Gherke. Cross Spruce Rd, then head right up Indian Reserve Rd until Precour Rd. Once you tee into Spruce Rd, it will be a left, then a short ride on the shoulder until turning into Devils Lake Trail to make the route a perfect 62mi!
-Amendment: 3rd ave removal at start/finish chute. Removed about 1 mile from race course, but ensured rider safety around initial turn at start.
-Amendment: slightly adjust exit off of Wildcat Ct through side-trail to Alpena-Hillman Trail and small Norway Ridge Adjustment (using marker 12 uphill to 462 exit)
Route and Elevation
Segments
| Name | Distance | Elev. Diff. | Avg. Grade |
|---|---|---|---|
| Hickey Hill - Thunder Bay Thriller | 0.95 mi | 154 ft | 2.6% |
| Devil's Lake NB | 4.99 mi | 33 ft | 0.1% |
| Thriller trail section’24 | 3.11 mi | -43 ft | -0.1% |