Race day on this page is Oct 24, 2026.
100.0 km
Grizzly 100
Saturday, October 24, 2026's Gravenvoeren, Limburg, Belgium
Goal time
12:00:00
Adjusted time (preview)
13:12:00–13:20:00
+1h12mins to +1h20mins slower
Challenging conditions. Main factor: elevation. Get your personalised finish time and split-by-split pacing plan with Race Pass.
Based on the historical mean for the race window over the last 10 years, ±5 days.
About 2583 m of climbing and 2579 m of descent. Hilly.
32% within 2%32% over 6%57 climbs24 climbs over 6%
Impacts
Based on the historical mean for the race window over the last 10 years, ±5 days.
Elevation
High impact
>3%
Heat
Low impact
≤1%
Wind
Moderate impact
1–3%
Total Impact
High impact
>3%
Pace Opportunity
Challenging
ChallengingModerateFavorable
Race Pass: personalised finish time, adjusted splits, and your race-day pacing plan.
Historical weather
Mean of race-window hours across the last 10 years, ±5 days around 24 October. Sticky years still count. This is not a forecast.
12°C
8 - 17°C range
Mostly cloudy on average
Historical: mostly cloudy, with moderate winds
Historical average
10 years · ±5d around 24 October
2016-2025
Cloud Cover
72%
0 - 100% range
Wind
17km/h
6 - 31 km/h range • prevailing SSW
Humidity
81%
63 - 92% range
WBGT
9.4°C
7.3 - 11.4°C range
Race morning history
Last 10 years, around the 06:00 start hour. Typical late-October air averages 12°C (about 4°C to 19°C in that window). The bands are that history, not a forecast range. Hover or drag to explore.
Race-morning temperature
Most mornings
8-14°C
Almost all
6-17°C
Humidity
84%
Dew
9°C
WBGT
9°C
11°CAverage
06:00-14:14
Almost all (90%)Most mornings (70%)AverageRain
Blue is most mornings. Dashed lines are the rare tails. Pink is the average. The bands are historical race mornings, not a forecast range. Blue columns are rain on the right scale. This assumes a 8:14. You can set your own time in the app.
Typical race-morning wind
Where the wind usually came from on race morning, not where it was going.
SSW
Most frequent (34%)
Wind speed
0-6 km/h
6-13 km/h
13-21 km/h
21+ km/h
A start that feels cool is not a promise about the second half.
Related races
Same city, region or country, when we can resolve them. World majors also point to each other.
- Maasrun
- Antwerp 10 Miles
- Bruges Marathon
- Brussels Marathon
- Gent Marathon
- IRONMAN 70.3 Knokke Run Leg
- Leuven Marathon
- Nieuwpoort Marathon
View race map for this area.
Make sense of the conditions
- Dew point, WBGT and running in the heat
Read the heat and humidity before deciding what pace makes sense.
- When drafting helps your running pace
A group can help, but its pace and the conditions still need to suit you.
- Pacing the climbs and descents
Use the course profile to think about effort, not just splits.
Pacing and conditions FAQ
Beyond conditions
Conditions are only part of the race-day loss
Pacing mistakes often add several minutes, sometimes more than conditions alone, especially when the course and conditions are not ideal.
What your plan includes
Everything you need to turn this race preview into a usable race-day plan.
Personalized pacing
Effort and pace guidance tuned to this course profile.
Weather-adjusted splits
Split targets that account for heat, wind, and elevation.
Heat adaptation & drafting
Adjust for your heat tolerance and drafting preferences.
Get your personalised race plan for Grizzly 100.
Pacing, splits, and race-day strategy personalised to your fitness and this course.
Want to compare options first? Compare plans