The Northumbrian
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The Northumbrian Trail Runs
The Northumbrian trail events take place at Kielder Waterside Park on Saturday 27th June 2026 and comprise two distances held on the day before the triathlon events. The races use newly created trails at Kielder, including the Lonesome Pine section, and start at Kielder Waterside. After a substantial 25 km loop participants join the triathlon run loop, and the final laps pass through the event village at Bull Crag before finishing at the lake edge.
The event is a UTMB Index race contributing to UTMB Index categories 20K and 50K. It is licensed by the Trail Running Association and will adhere to UK Athletics rules. Cut off limits are set by checkpoint distance: 20 km in 4 hours, 30 km in 6 hours, and 50 km in 10 hours.
Mandatory kit items listed in the race pack include capacity to carry 500 ml to 1 L of water, a functioning head torch, suitable trail running footwear, a waterproof jacket with hood, a medical kit, a reusable cup, a fully charged mobile phone, a survival bag, food reserves, a whistle, and personal ID. Minimum ages are 18 for the 28K and 20 for the 50K.
Available race inclusions listed for each entry include a race t-shirt, electronic chip timing, on course support and nutrition, a medal, and a registration goody bag. Visit the organization's website for the most recent information.
