Kielder Marathon
Race Day Weather
Cool conditions, headwind to manage
Runners will face a steady temperature increase from 50°F to 55°F during the race, with high humidity at 90% and a dew point of 51°F. A headwind of up to 17 mph will challenge runners, especially in exposed areas. Adjusting pace conservatively and focusing on hydration will be key to maintaining performance.
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.
