Ardmore, OK, United States · Saturday, October 24, 2026

Fixed Distance 100K

Lake Murray 100km Endurance Run

24 days to go

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.

34.1743° N, 97.1436° W © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Time limit 32 hours 19:12 min/km average. Generous. Walkable throughout for most of the field. Climbing is unpublished, so this pace is a ceiling on the effort, not a measure of it. Among the most forgiving 100K cut-offs we track. Measured against 214 races of the same distance. Cut-off calculator →

Field size ~9 Tiny. You will run alone for most of it.

DUV results for the 2025 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, October

Daytime high 24°C

Night low 12°C

Rainfall Showers likely

Daylight 11 h 05 m of light

Regional 2001-2020 average for October — NASA POWER, grid elevation 239 m. Not a forecast.

Results history

Year	Race	Finishers	Men's winner	Women's winner
2025	100km	9	Trevor Watkins · 15:23:09	Heather Vannes · 25:21:21
2024	100km	8	Aleksandr Gerasimov · 15:39:09	Anna Black · 13:46:04
2023	100km	7	Clifford Culwell · 15:48:05	Kim Helzer · 17:44:22
2022	100km	25	Josh Heimbach · 10:40:57	Jessica Bryant · 14:12:29
2021	100km	15	Cody Pepper · 13:45:19	Carrie Bishop · 14:50:00
2019	100km	7	Jason Hammel · 15:51:16	Amy Clark · 13:54:20

The field grew 13% between 2024 (8) and 2025 (9). 11% of the 2025 field were women.

DUV results for the 2025 edition (100km) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

The Aid Station

Course-specific beta from the community

👟 gear

With trail terrain, choose a shoe with moderate cushioning for optimal performance.

By UltraHub Expert

🥤 nutrition

For 100km+ efforts, prioritize real food at aid stations to prevent palate fatigue.

By UltraHub Expert

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 32 h limit puts you out there after dark.
Accessories Chafe and blisters end more 100 km races than fitness does.

Brooks

Catamount 3

RunRepeat found the Brooks Catamount 3 to have a cozier upper that enhances the overall fit, though breathability and durability could be better. iRunFar noted…

★★★★★ 4.5

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

Spring Energy