Entries are now open for the 2026 Altra Kielder Marathon Weekend!
The Altra Kielder Marathon route follows an almost entirely off-road course around northern Europe’s largest man-made lake, Kielder Water, in Northumberland.
Britain’s Most Beautiful Marathon is the finale to a weekend of events, starting with the 10K & Gravel Duathlon, joined by the Altra Kielder Half Marathon and Junior races. It all adds up to an electric atmosphere and a fabulous weekend in this beautiful part of the country.
Why not make a short break of it and bring your friends and family along? There is plenty to do in and around Kielder Water and the wider Northumberland countryside! Use the accommodation link to look for places to stay.
- Medal and goody bag for all finishers
- FREE Park & Ride system for all runners. Spectator passes at £3 for the day with shuttle buses to numerous vantage points on the route.
- Secure baggage drop
- Local produce and refreshments
- Prizes for top 3 male and female and first V40, V50, V60
Find out more and enter now at kieldermarathon.com
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