• Half Marathon
  • 21.1 km
  • Osawatomie
  • Event dates
  • Open entry

Ultrapalooza (Flint Hills Trail) Half Marathon

This race edition

Race date
Date not confirmed for this distance
Race timezone
Timezone not confirmed
Edition status
Status not confirmed

Entry options

2026 edition

Entry options are not yet confirmed for this edition. Check the organiser before making plans.

Decision summary

Ultrapalooza (Flint Hills Trail) Half Marathon at a glance

Cut-off average pace
17:04/km

6:00:00 total limit divided by distance. Check gun/chip timing and intermediate limits; allow time for stops.

Typical conditions
51/100

Historical race-date favourability, not a forecast

Evidence depth
28 verified facts

Source facts available

Route details

Known course facts at a glance

Methodology →

Ultrapalooza (Flint Hills Trail) Half Marathon has known course details for its half marathon race. The summary below keeps the focus on what is confirmed for the course.

Official distance
21.1 km
Terrain
Trail, Beach
Scenery
Countryside, Waterfront, Historic, Desert, Riverside, Forest

Quick answers

What runners ask first

Where does the Ultrapalooza (Flint Hills Trail) Half Marathon route go?

The Ultrapalooza (Flint Hills Trail) Half Marathon route starts at Mile 0 Flint Hills Trail head, 1400 South Street, Osawatomie, KS 66064 and finishes at Mile 0 Flint Hills Trail head, Osawatomie, KS (all races start and finish here). Underfoot, expect flat crushed gravel, comprising single-track trail, old railroad beds and towpath trail. It passes Flint Hills, Marais des Cygnes River, river bluffs, rolling farmland and riparian woodlands. The Flint Hills Trail follows portions of the Santa Fe National Historic Trail and is part of the American Discovery Trail.

Race character

Scenery

  • Countryside
  • Waterfront
  • Historic
  • Desert
  • Riverside
  • Forest

Terrain

  • Trail
  • Beach

Entry, logistics and records

Entry requirements

Entry status
Open entry: The held registration model is open entry and this edition is not marked sold out.
Cut-off
6 hour time limit

Access and course status

Start
Mile 0 Flint Hills Trail head, 1400 South Street, Osawatomie, KS 66064
Finish
Mile 0 Flint Hills Trail head, Osawatomie, KS (all races start and finish here)

Course facts

Course type
Out And Back
Surface
Flat crushed gravel, comprising single Track trail, old railroad beds and towpath trail.
Landmarks
Flint Hills, Marais des Cygnes River, river bluffs, rolling farmland, riparian woodlands, tallgrass prairie
Notable features
  • Part of the Kansas Super Slam of Ultra Running Series
  • Organised by Midwest Endurance Race Co
  • The Flint Hills Trail follows portions of the Santa Fe National Historic Trail and is part of the American Discovery Trail
  • Aid stations no more than ~4-6 miles apart
  • manned stations stocked with water, Hammer Nutrition HEED electrolyte drink, gels, sandwiches, chips, candy and snacks, unmanned stations water only

What are typical race-day conditions?

  • 21°CTypical temperature
  • 17 kphTypical wind
  • 3 mmTypical rainfall
  • 51Favourability /100
Typical conditions for the race date and locality, warmer than the endurance-optimal window. These are climatological norms, not a forecast, and are shared across every distance at this event.