Midwest Endurance Ultrapalooza

Osawatomie, United States • 27-28 Sep 2025

Ultrapalooza is a ultramarathon held in Osawatomie, Kansas, on the Flint Hills Trail. The event, part of the Kansas Super Slam, offers distances from 5K and 10K up to 50K, 50M, 100K, and 100M, plus a marathon distance. Runners begin and finish at Mile 0 Flint Hills Trailhead, with a flat, crushed-gravel, mostly out-and-back course along prairie, rail-bed towpath sections near the Marais Des Cygnes River. Aid stations are well stocked and spaced about four miles apart. The weekend features swag, distance-specific hardware, lights, music, a finish-line atmosphere with cowbells and a food truck, and a photographer capturing the spirit. Visit the organization's website for the most recent information.

Race 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
Visit the organization's website for the most recent information.
Trail runs nearby

Flat, accessible rails to trails running on crushed limestone through scenic Kansas towns in an out and back from Ottawa. Distances 5 to 100 miles, aid about every 5 miles, pacers in second halves, and buckles or medals for finishers.

Take on the scenic Flint Hills Trail at the Mile 0 Trailhead in Osawatomie with distances from a 50K to a fun run. Flat crushed gravel, frequent aid, on course timing and tech shirts make this a well supported spring trail event.