The Northumbrian

The Northumbrian is an endurance event held in Northumberland's scenic Kielder Water and Forest. Returning for its fourth edition in June 2025, it features full and half-distance triathlons, including swimming, cycling, and running through challenging terrain. New for 2025 are ultra trail runs: a 50K and a 20K, both with significant elevation gains.

Participants receive race gear, support, nutrition, and medals. The event combines stunning scenery with demanding courses, attracting athletes seeking adventure, endurance, and achievement in a unique natural setting. It is part of the broader "Events of the North" series promoting active lifestyles and outdoor sports. Visit the organization's website for the most recent information.