Jackass Gulch

Development Route

“Mountain climbs, beautiful river views, and a gravel KOM” is the way this route was promoted when put on as a Gran Fondo in 2019. Even though the route then was mostly paved road, it appears the difficulty of the gravel was undersold. The event has not been put on as a Gran Fondo since.

However, with a gravel bike sporting 40 mm tires and a few route modifications (which we made!), we think this route has potential. We recommend you give it a go in the spring when the dirt / gravel is firm, the washboard is less, and the days are not brutally hot.

We have not ridden this route, thus the Development Route designation. However, we would appreciate your feedback if you give it a go. Leave us a comment below.

Adventure / Gravel Route

– Loop: 54 miles / 4200 ft gain
– Surface: ~ 50 % gravel, 50% paved
eBike Friendly:: Yes
– Location: ~ Boise, Idaho
– Published: April 2019


Moderate+. Due to distance and elevation gain.

The Start

Shadow Valley Public golf course
Lat / Long: 43.746426, -116.295339


Cue Sheet / GPX file / TCX file


Red = paved roa
Brown = gravel / dirt road

For help with GPS files, the RideWithGPs mapping app and to learn how to download our routes for free, see the “Using Our Rides” page.

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