Groningen, Netherlands · Saturday, November 14, 2026

Fixed Distance 50K

3 rondjes Groningen

44 days away
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.

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53.2192° N, 6.5667° E © OpenFreeMap © OpenMapTiles Data from OpenStreetMap

What the course asks

Time limit 6 hours 7:12 min/km average. Firm. Sustained running. Long aid-station stops will cost you. Climbing is unpublished, so this pace is a ceiling on the effort, not a measure of it. Among the tightest 50K cut-offs we track. Measured against 1034 races of the same distance. Cut-off calculator →

Typical conditions, November

Daytime high 9°C
Night low 4°C
Rainfall Mostly dry
Daylight 8 h 46 m of light

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

The Aid Station

Course-specific beta from the community

👟 gear

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

By UltraHub Expert

Gear for this race

Chosen for 50 km of road.

  • Trail Running Shoes 50 km of road — 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.

Adidas

Adizero Evo SL

RunRepeat found the Adidas Adizero Evo SL to be lightweight and well-cushioned, with a 100% Lightstrike Pro midsole and world-class Continental outsole. irunfar…

★★★★★ 4.7

Salomon

Sense Ride 5

RunRepeat found the Salomon Sense Ride 5 to have immaculate lockdown and a smooth and stable ride, making it confident on moderate trails and steep downhills. I…

★★★★★ 4.5

Maurten

Gel 100

Hydrogel technology for 25g carbs per gel with minimal GI distress.

$3.5 ★★★★★ 4.7

Naked

Running Band

Minimalist waist-mounted running band. Ultra-light alternative to a vest for shorter races.

$60 ★★★★☆ 4.3

Suunto

Vertical

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

$630 ★★★★★ 4.5
All gear guides →

Overview

The 3 rondjes Groningen is a 50k road race held in Groningen, Netherlands, on November 14, 2026. This free-entry event offers a challenging time limit for its distance.

With a 6-hour cut-off, this race's time limit is tighter than 98% of its 1011 peer 50k races. This means runners must maintain a pace faster than 7.2 minutes per kilometer throughout the 50-kilometer course to finish within the allotted time. The strict cut-off leaves very little margin for error or a slower pace, making it a demanding event for even experienced ultra-runners.

Similar races

Other 50K road ultras, closest in distance first.