Jackass Gulch

Development Route / by Captain ‘O’

Note: This is a Development Route, meaning that it is a work in progress and currently does not meet the Dirty Freehub 5 Star standard for great routes.

“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.

Note, we recentlyupdated (January 2021) the route to remove a significant stretch of highway riding. This changed the start location and the distance / elevation gain. Also, the route may now ride better in the opposite direction from that we have mapped.

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: 44 miles / 3800 ft gain
– Surface: ~ 75% gravel, 25% paved
eBike Friendly:: Yes
– Location: ~ Boise, Idaho
– Published: April 2019 (update January 2021)

Technical Difficulty & Risk[what this means]

Moderate (Overall)

  • Riding skills required: moderate
  • Navigation challenge: low
  • Remote risk: moderate

The Start

3 Horse Ranch Vineyards. Please check with the vineyard before parking for the day. And … at the end of the day grab a bite to eat and a few bottles of wine to go!
Lat / Long: 43.832139, -116.407570

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.


Red = paved road
Brown = gravel / dirt road


Cue Sheet / GPX file / TCX file

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