Victoria, London, United Kingdom · Saturday, June 12, 2027

Fixed Distance 100K

London 100

236 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.

51.4936° N, 0.1408° W © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Time limit 17 hours 10:12 min/km average. Firm. Climbing is unpublished, so this pace is a ceiling on the effort, not a measure of it. About average for a 100K. Measured against 226 races of the same distance. Cut-off calculator →
Field size ~107 Mid-sized. Company early, well spread out by halfway.

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, May

Daytime high 17°C
Night low 7°C
Rainfall Mostly dry
Daylight 16 h 33 m of light

Regional 2001-2020 average for May — NASA POWER, grid elevation 73 m. Not a forecast.

Results history

Year Race Finishers Men's winner Women's winner
2026 100km 107 Rob Raguet-Schofield · 09:10:55 Megan Huggins · 10:03:05
2025 100km 82 Peter Thomason · 08:39:44 Anna Brown · 10:09:16

The field grew 30% between 2025 (82) and 2026 (107). 19% 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 17 h limit puts you out there after dark.
  • Accessories Chafe and blisters end more 100 km races than fitness does.
All gear guides →

Overview

Held in Victoria, London, the London 100 is a fixed-format 100k trail race organised by Camino Ultra / Participation Sport, scheduled for June 12, 2027.

The 17-hour time limit demands an average pace of 10.2 minutes per kilometre to reach the finish line. That cutoff splits the distance category right down the middle—tighter than 50% of 100k cut-offs and more generous than 50% across 224 peer events, giving runners an entirely balanced pacing challenge without excessive margin for prolonged stops.

With 107 finishers in 2026, the event sits in the upper tiers of pack density for the distance. Its starting grid is bigger than 73% of 100k fields and smaller than 27% across 329 comparable races, ensuring participants spend their race day among steady company along the trail.

Similar races

Other 100K trail ultras, closest in distance first.