4Louis' Big Kielder Weekend
3 October 2026 - 4 October 2026
Kielder Marathon Weekend
Set in the heart of Northumberland’s wild and beautiful landscape, Kielder Marathon Weekend is one of the UK’s most scenic endurance events. Taking place around the shores of Kielder Water and through the vast forest, the weekend offers a truly unforgettable experience in a remote and peaceful setting.
Across the weekend, runners and multisport athletes can choose from different events, each showcasing quiet, lakeside views and mile after mile of stunning forest.
The Weekend is an event for everyone, whether you’re a seasoned endurance athlete, taking on a new distance, or supporting a young runner at their first event, there’s something for everyone at Kielder Marathon Weekend.
- Kielder Marathon (26.2 miles) – A full marathon challenge on one of the UK’s most scenic road routes.
- Kielder Half Marathon (13.1 miles) – A stunning and rewarding half marathon around Kielder Water.
- Kielder 10K (6.2 miles) – An achievable and scenic 10K, perfect for all abilities.
- Kielder Gravel Duathlon (10km run / 34km bike / 6.4km run) – A unique run–ride–run challenge through rugged gravel terrain.
- Ospreys U11 (1.5km) – A fun, friendly race introducing younger runners to race day.
- Falcon U15 (3km) – An exciting junior race for young athletes ready to step up their challenge.
No matter if you’re chasing a personal best, taking on a new challenge, or soaking up the atmosphere in one of the UK’s most spectacular outdoor locations, Kielder Marathon Weekend delivers an inspiring mix of challenge, adventure and achievement.