Shawnee Hills Trail Races

AUG
22-23
2026
Shawnee Hills Trail Races runs August 22 and 23, 2026 at Camp Ondessonk in Ozark, Illinois. Multiple distances including 100 mile, 100k, 50k and a half marathon traverse sandstone canyons and waterfalls with on-site tree house lodging.
22-23 Aug 2026
100 miles 100 kilometers 50 kilometers 13 miles

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Shawnee Hills Trail Races

Shawnee Hills Trail Races takes place August 22 and 23, 2026 at Camp Ondessonk in Ozark, Illinois. The event is presented by Stack'd and is based at Camp Ondessonk within the Shawnee National Forest.

Distances offered include:

  • 100 mile
  • 100k
  • 50k
  • Half Marathon

The courses run through sandstone canyon systems and forested terrain, traversing areas such as Jackson Hollow and the Bay Creek Reservoir. The route passes several named waterfalls and viewpoints, including Pakentuck Falls, Jackson Falls, Horseshoe Falls, Cedar Falls, and views from Salomon's Ridge. Vegetation along the course is described as oak-hickory, maple-beech, and pine forest.

On-site accommodations at Camp Ondessonk include open-air tree houses that provide a roofed sleeping area without doors or screens; typical packing suggestions are a sleeping bag, clothing, and running shoes. Tenting on the ground is available, and there are a limited number of hostel-style, climate-controlled guest rooms that sleep eight, with private bathrooms and free WiFi.

Race photography for 2025 and 2026 is provided by Inzaption Photo. Visit the organization's website for the most recent information.

100 mi
100 Mile
100 km
100k
50 km
50k
13 mi
Half Marathon
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