Ultra Running Hub Noordwijk, Netherlands · Saturday, December 19, 2026
Fixed Distance 50K
Hollands Duin Ultra
94 days away
50 km Distance
750 m Climbing
3.6 Grit · Challenging
What the course asks
Climbing rate 15 m / km
Rolling. Moderate undulations. Requires consistent effort across varying grades.
Time limit 9 hours
10:48 min/km average. Generous. Walkable throughout for most of the field. Tighter than 71% of 50K races. Measured against 1007 races of the same distance. Cut-off calculator →
Field size ~139 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, December
Daytime high 7°C
Night low 3°C
Rainfall Mostly dry
Daylight 7 h 43 m of light
Regional 2001-2020 average for December — NASA POWER, grid elevation 0 m. Not a forecast.
The Aid Station
Course-specific beta from the community
This is a rolling course. Expect fast, runnable sections where rhythm is key.
With trail terrain, choose a shoe with moderate cushioning for optimal performance.
Gear for this race
Chosen for 50 km of trail with 750 m of ascent.
- Trail Running Shoes50 km of trail — cushioning that is still there in the last quarter.
- Race Nutrition50 km of self-supported fuelling between aid stations.
- Hydration VestsFlask capacity for 50 km, without the bounce.
- GPS WatchesBattery life first — a 50 km day outlasts most full-GPS modes.
Course Notes
door het duingebied vanaf Vrijstaat Nederzandt - Noordwijk
Similar races
Other 50K trail ultras, closest in distance first.