Deadwater Dirty Duathlon

NOV

22

2026

A winter duathlon at Kielder Castle, combining trail runs and mountain biking on red-graded tracks. Tackle the 10km run, 12km bike, and 7.5km run solo or as a pair. Expect a marked course and a winter challenge in Northumberland.

Sun 22 Nov 2026

Kielder, North East (England)

Website Registration

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Event Overview

The Deadwater Dirty Duathlon is a winter duathlon consisting of two trail runs and one mountain bike segment. It takes place at Kielder Castle in Northumberland.

Distances and Course

The event format involves three legs:

Run 1: 10 km
Mountain Bike: 12 km on red-graded trails
Run 2: 7.5 km

The course starts with a bike-led run from Kielder Castle onto steep running trails, followed by the mountain bike leg. The runs and bike leg will be marked with different colored signs. GPX files will be made available for each leg. Some sections of the trail will be closed to the public.

Participation

Participants can enter as a solo competitor or as a team of two. A solo entry covers all three legs, while a team splits the running and cycling legs between them. The race starts at 10:00.

Practical Information

Registration opens at 06:00 and closes at 08:30 at Kielder Castle. A safety briefing is at 08:45. The transition area is located around the castle's circumference. Ample pay-and-display parking is available within walking distance. Public toilets are located across the road from the castle.

Requirements and Fees

Participants must have a fully functioning mountain bike (or gravel bike) and a helmet. The use of an emergency whistle and a waterproof/windproof jacket is suggested. Entry fees include a race number, safety team, professional communications cover, medical staff, a marked route, and prize categories. Early bird pricing is available until March 31st. Visit the organization's website for the most recent information.