Gasselte, Netherlands · Saturday, October 10, 2026

Fixed Distance 50K

Indian Summer Ultra 50 km

9 days to go

50 km Distance

not publishedn/a Climbing

2.5 est Grit · Entry level

Calculated from 50 km alone — the organiser has not published an elevation profile. Read 2.5 as a floor, not a verdict.

52.9717° N, 6.7944° E © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Time limit 10 hours 12:00 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 Climbing is unpublished, so this pace is a ceiling on the effort, not a measure of it. About average for a 50K. Measured against 1034 races of the same distance. Cut-off calculator →

Field size ~133 Mid-sized. Company early, well spread out by halfway.

DUV results for the 2025 edition (50km) — 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 14°C

Night low 7°C

Rainfall Mostly dry

Daylight 11 h 04 m of light

Regional 2001-2020 average for October — NASA POWER, grid elevation 5 m. Not a forecast.

Results history

Year	Race	Finishers	Men's winner	Women's winner
2025	50km	133	Leo van der Veen · 04:32:21	Sabine Spreen · 04:10:26
2024	50km	166	Roland Vos · 03:48:18	Tessa Striekwold · 04:46:28
2023	50km	167	Tom Zanden · 03:35:18	Anita Bouma · 05:16:45
2022	50km	107	Tom van der Zanden · 03:56:27	Anniek Zaalberg · 04:45:16

The field shrank 20% between 2024 (166) and 2025 (133). 29% of the 2025 field were women.

DUV results for the 2025 edition (50km) — 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

Gear for this race

Chosen for 50 km of trail.

Trail Running Shoes 50 km of trail — cushioning that is still there in the last quarter.
Race Nutrition 50 km of self-supported fuelling between aid stations.
Hydration Vests Flask capacity for 50 km, without the bounce.
GPS Watches Battery life first — a 50 km day outlasts most full-GPS modes.

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

Adidas

Terrex Speed Ultra

RunRepeat found the Adidas Terrex Speed Ultra to have a grippy outsole and great lockdown, while iRunFar noted that the shoe works on a variety of trail conditi…

★★★★★ 4.5

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

Suunto

Vertical

Titanium GPS watch with solar charging, offline maps, and 140-hour GPS battery.

$630 ★★★★★ 4.5

All gear guides →

Overview

The Indian Summer Ultra 50 km in Gasselte, Netherlands, is a trail race held in October. With 133 finishers at its latest edition, it draws a larger field than 85% of 50k races.

The 10-hour time limit gives a cutoff pace of 12 minutes per kilometer. This is a more generous cutoff than 42% of 50k races, allowing more time on course compared to many peers. The course is described as completely trail with no significant elevation, and only a few percent is paved.

Similar races

Other 50K trail ultras, closest in distance first.