kieldermarathon.com

Kielder Marathon

Name: Kielder Marathon
Start: 2026-10-03
End: 2026-10-04
Location: Kielder

location_city Kielder

flag United Kingdom

calendar_today 03 Oct, 2026 – 04 Oct, 2026

kayaking Multisports

language Official Website

About the Event

Escape into the vast, tranquil wilderness of Northumberland for the Altra Kielder Marathon Weekend, October 3-4, 2026, where the celebrated "Britain's most beautiful" marathon unfolds around the stunning shores of Northern Europe's largest man-made lake. This iconic weekend offers a challenge for every athlete, from the flagship off-road marathon and half marathon to a fast 10k, a thrilling Gravel Duathlon, and inclusive junior races, all set within the breathtaking Kielder Water & Forest Park. The marathon course is a uniquely serene and demanding 26.2-mile trail journey, where runners are immersed in pristine pine forests and treated to sweeping, uninterrupted views of the iconic landscape with every step. Organized by Events of the North, the weekend is renowned for its impeccable, friendly atmosphere and deep connection to the natural environment, creating a perfect balance of peaceful solitude and shared community spirit. Whether you're a seasoned trail runner seeking a pristine, traffic-free route or a road athlete looking for a scenic new challenge, Kielder provides an unforgettable backdrop for personal achievement. Secure your entry for an autumn weekend where the only sounds are your footsteps on the trail and the collective celebration at the finish line, all within one of the UK's most majestic and unspoiled settings.

Races Offered

10 KM

Oct 03, 2026

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Distance — 10K

terrain

Type — Duathlon

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276 days remaining

Run Bike Run

Oct 03, 2026

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Distance — 11K 25K 6K

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Type — Duathlon

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276 days remaining

Half Marathon

Oct 04, 2026

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Distance — 21.1K

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Type — Duathlon

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276 days remaining

Marathon

Oct 04, 2026

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Distance — 42.2K

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Type — Duathlon

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276 days remaining

Weather Overview

These values represent the 3-year monthly averages for October in Kielder.

Temp (°C)

Feels Like (°C)

thermostat 7.0° / 12.1°

wb_sunny 3.0° / 8.4°

Wind (km/h)

Humidity (%)

air 17.2 /

water_drop 88.8%

Temp (°C)

Feels Like (°C)

Wind (km/h)

Humidity (%)

thermostat 7.0° / 12.1°

wb_sunny 3.0° / 8.4°

air 17.2 km/h

water_drop 88.8%

About Kielder

Kielder is a small, remote village in western Northumberland, England. Located at the head of Kielder Water and in the north west of Kielder Forest, the village is within three miles of the Scottish border.