The route
155.2 km and 5,058 m of climbing, out-and-back through the Bighorn National Forest to Jaws Trailhead.
Drawn with a pen, line by line
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Indicative figures computed by Plotrek on its illustrative route, with altitudes from a terrain model. They may differ from the organiser's.
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Bighorn 100 runs out-and-back: the same trail, through the Bighorn National Forest, carries runners both ways. The start is at 9 am, on Tongue Canyon Road.
The trail climbs straight into technical single-track, then alternates doubletrack and gravel road across the high country, with mud on some sections. Most of the route stays deep in the backcountry, far from any road.
It climbs to the course's high point, 2,742 m, just ahead of the Jaws Trailhead turnaround — roughly the halfway mark. From there, runners retrace the same trail in the other direction.
The way back passes Tongue Canyon Road again, then reaches Dayton for the finish at Scott Park. Runners get 35 hours, start to finish, to complete the out-and-back.
Paths and places: © OpenStreetMap contributors. Altitudes measured on the route.
03 · Your poster
The relief of the course, a 155.2 km out-and-back from Tongue Canyon Road, takes shape as contour lines: our pen plotter draws it with a pen, line by line. Your finisher name and time go in the title block, in A4, A3 or A2.
Shipped from our workshop in Le Bouscat
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Updated Route and text: Plotrek workshop (Fabrice Jolivet)
Plotrek's illustrative route, redrawn on OpenStreetMap paths, measures 155.2 km and 5,058 m of elevation gain. Start: Tongue Canyon Road; finish: Scott Park (Dayton); on the way, Tongue Canyon Road at km 147.2. The elevation loss measured on this route is 5,116 m. These figures are indicative; the organiser's rules prevail.
The highest point of Plotrek's route is at 2,742 m, at km 77.3. The high point lies between two landmarks of the course: Tongue Canyon Road (1,249 m, km 0) and Tongue Canyon Road (1,288 m, km 147.2). The start is at 1,249 m, the finish at 1,191 m.
1,339 m of elevation gain in one go, from km 46.5 to km 77.3 of Plotrek's route. No other climb on the 155.2 km course is as long. Average gradient of this section: 4.3%. It accounts for 26% of the route's elevation gain. Altitudes measured on the route, with a terrain model.
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