Midwest Endurance Ultrapalooza

SEP
26-27
2026
Experience a flat and fast out and back race on the historic Flint Hills Trail featuring multiple distances from a 5K to a 100 miler through the Kansas prairie.
26-27 Sep 2026
100 miles 100 kilometers 50 miles 50 kilometers Marathon Half Marathon 10 kilometers 5 kilometers

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Ultrapalooza

Ultrapalooza is a multi-distance running event held in Osawatomie, Kansas. The event takes place on the Flint Hills Trail, which is a rail-trail following the route of the Santa Fe National Historic Trail and the American Discovery Trail. The course consists of a flat, fast surface made of crushed gravel, utilizing old railroad beds and towpath trails. Runners pass through tallgrass prairie ecosystems, rolling farmland, and riparian woodlands along the Marais Des Cygnes River.

The event offers several distances:

  • 100 Miler
  • 100K
  • 50 Miler
  • 50K
  • Marathon
  • 1/2 Marathon
  • 10K
  • 5K

All races start and finish at the Mile 0 Flint Hills trail head in Osawatomie, which serves as the main hub for the event. The course is an out-and-back format. Manned aid stations are positioned no more than 6 miles apart and are stocked with water, electrolyte drinks, and various food items. Unmanned stations provide water only.

Participants in the 100 Miler, 100K, and 50 Miler have a 30-hour time limit to complete their respective courses. These distances also permit the use of pacers at specific points in the race. Drop bag services are available for runners at all manned aid stations. The event is part of the Kansas Super Slam of Ultrarunning Series. All participants receive a technical blend race shirt and distance-specific hardware upon finishing. Visit the organization's website for the most recent information.

100 mi
100 Miler
100 km
100k
50 mi
50 Miler
50 km
50k
Marathon
Marathon
Half Marathon
1/2 Marathon
10 km
10k
5 km
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