Ottawa, KS, United States · Saturday, March 27, 2027

Fixed Distance 100K

Prairie Spirit 100 km Trail Ultra Race

145 days away

100 km Distance

not publishedn/a Climbing

5.0 est Grit · Challenging

Calculated from 100 km alone — the organiser has not published an elevation profile. Read 5.0 as a floor, not a verdict.

38.6156° N, 95.2678° W © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Time limit 20 hours 12:00 min/km average. Comfortable. Climbing is unpublished, so this pace is a ceiling on the effort, not a measure of it. More forgiving than 72% of 100K races. Measured against 233 races of the same distance. Cut-off calculator →

Field size ~16 Tiny. You will run alone for most of it.

DUV results for the 2026 edition (100km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, March

Daytime high 13°C

Night low 1°C

Rainfall Mostly dry

Daylight 12 h 23 m of light

Regional 2001-2025 average for March — NASA POWER, grid elevation 302 m. Not a forecast.

Results history

Year	Race	Finishers	Men's winner	Women's winner
2026	100km	16	Braden Brown · 08:48:57	Rebecca Romary · 10:34:51
2025	100km	13	Forrest Kievit · 09:45:53	Andrea White · 09:22:45
2024	100km	21	Michael Dunn · 10:47:52	Carrie Grant · 10:04:14
2023	100km	21	Matt O'Reilly · 08:54:36	Hannah Hughes · 11:21:44
2022	100km	28	Giff Walters · 07:53:09	Shonda Jay · 12:45:48
2021	100km	20	David Callison · 11:18:03	Chari Gay · 10:23:58
2019	100km	20	Mark Hammond · 08:34:56	Marcia Dority Baker · 11:27:13

The field grew 23% between 2025 (13) and 2026 (16). 25% of the 2026 field were women.

DUV results for the 2026 edition (100km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Course notes

gear With trail terrain, choose a shoe with moderate cushioning for optimal performance.
nutrition For 100km+ efforts, prioritize real food at aid stations to prevent palate fatigue.

Gear for this race

Chosen for 100 km of trail.

Trail Running Shoes 100 km of trail — cushioning that is still there in the last quarter.
Race Nutrition Past 100 km the palate quits before the legs do — carry more than one flavour.
Hydration Vests Flask capacity for 100 km, without the bounce.
Headlamps A 20 h limit puts you out there after dark.
Accessories Chafe and blisters end more 100 km races than fitness does.

La Sportiva

Prodigio Pro

RunRepeat found the La Sportiva Prodigio Pro to have a secure, locked-in fit due to its premium upper, and also praised the shoe's energetic ride, particularly…

$225 ★★★★★ 4.6

Asics

Trabuco Max 2

★★★★★ 4.7

Tailwind

Endurance Fuel

All-in-one calorie and electrolyte drink mix. 200 calories per serving.

$25 ★★★★★ 4.8

Salomon

ADV Skin 12

Industry-standard 12L race vest with front flask pockets and minimal bounce.

$180 ★★★★★ 4.8

Petzl

NAO RL

1500-lumen reactive lighting headlamp with 15-hour runtime. Automatic brightness adjustment.

$150 ★★★★★ 4.7

Squirrel's Nut Butter

Anti-Chafe Balm

All-natural anti-chafe balm. Essential for 100+ mile races.

$12 ★★★★★ 4.8

All gear guides →

Overview

The Prairie Spirit 100 km Trail Ultra Race will take place on March 27, 2027, starting in Ottawa, KS. This 100 km trail race has a cut-off of 20 hours, which is more generous than 72% of 100k races. This allows for a pace of 12 minutes per kilometer.

With a field smaller than 71% of 100k races, this event has seen a maximum of 16 finishers in its most recent edition in 2026. The course is primarily on a crushed limestone trail, with asphalt paths through each town.

Similar races

Other 100K trail ultras, closest in distance first.