The Northumbrian

The Northumbrian is an ultimate endurance triathlon event set in the picturesque Kielder Water and Forest in Northumberland. Scheduled for its fourth edition in June 2025, this event offers both full and half-distance iron triathlons, featuring a 2.4/1.2-mile swim, a 112/56-mile bike ride, and a 26.2/13.1-mile run. Participants can expect breathtaking scenery, challenging terrain, and a supportive atmosphere.

Each entry includes a cycling jersey, swim cap, electronic timing, on-course support, nutrition, a medal, and a finisher's goody bag. The event celebrates adventure and achievement, making it a must for endurance athletes. Visit the organization's website for the most recent information.