Fort Augustus, United Kingdom · Saturday, July 4, 2026

Fixed Distance 50 mi

Great Glen Ultra Marathon 42mi

Race completed
68 km Distance
6,000 m Climbing
10.0 Grit · Elite / extreme
57.1448° N, 4.6814° W © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Climbing rate 88 m / km Vertical. Extreme verticality. This is a technical mountain course with sustained steep grades.
Time limit 13 hours 11:28 min/km average. Comfortable. About average for a 50 mi. Measured against 477 races of the same distance. Cut-off calculator →
Field size ~27 Small. Long stretches with nobody in sight.

DUV results for the 2024 edition (42mi) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Typical conditions, July

Daytime high 15°C
Night low 9°C
Rainfall Showers likely
Daylight 17 h 46 m of light

Regional 2001-2020 average for July — NASA POWER, grid elevation 483 m. Not a forecast.

Results history

Year Race Finishers Men's winner Women's winner
2024 42mi 27 John O'Donnell · 05:47:25 Lucy Roscrow · 07:32:44
2023 42mi 47 Philip Buckley · 06:22:12 Karen McIntyre · 07:08:56
2022 42mi 30 Richard Agnew · 07:25:40 Louise Couceiro · 07:54:59

The field shrank 43% between 2023 (47) and 2024 (27). 33% of the 2024 field were women.

DUV results for the 2024 edition (42mi) — finishers only. Starters are not published, so the field was at least this big and no finish rate can be given.

Course notes

  • terrain This is a vertical course. Poles are highly recommended for the sustained climbs.
  • gear With trail terrain, choose a shoe with moderate cushioning for optimal performance.

Gear for this race

Chosen for 68 km of trail with 6,000 m of ascent.

All gear guides →

Overview

The Great Glen Ultra Marathon 42mi is a 68-kilometer trail race that was last held in 2024, starting in Fort Augustus and finishing in Inverness. With 6000 meters of elevation gain, the course climbs 88 meters per kilometer.

The 13-hour time limit allows for a pace of 11.5 minutes per kilometer, which is more generous than 56% of 50-mile race cut-offs and tighter than 44%. The field of 27 finishers in 2024 was smaller than 69% of 50-mile race fields, and bigger than 30%.

Similar races

Other 50 mi trail ultras, closest in distance first.