Kielder Marathon
Race Day Weather
Cool morning, light wind, possible rain
Runners will face temperatures starting at 49°F and rising to 53°F, with a light wind from the SW at 12 mph. Humidity will be high at 82%, prompting a strategy to start conservatively. Light rain is possible, so a throwaway layer may be advisable during the pre-race wait.
Pace Calculator
Enter a finish time to see what race day does to it.
Get forecast alerts for Kielder Marathon
We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.
Race Info
The Kielder Marathon runs almost entirely off-road on trails around Kielder Water in Northumberland, England, the largest man-made lake in Northern Europe by capacity. The course follows the Lakeside Way through Kielder Forest, England's largest working forest. The race weekend also includes a half marathon, 10K, gravel duathlon, and junior races around the reservoir.
