Dacorum District
Triathlon Calendar near Dacorum District 2026-2027
Monthly updates for Dacorum District
Get new running races (and updates) in your inbox every month.
Explore the top triathlons near Dacorum District for 2026-2027! We've gathered 52 exciting races in the area. Check out our detailed list below to find your next local race.
August 2027
SPRINT Superhero Tri is a short multisport challenge with a 150 m swim, 3 km bike and 1 km push/run. Entries can be solo, relay, or pulling a Superhero; everyone on course must be registered and receives a medal, T shirt and Super Kit Bag.
Beginner-friendly triathlon at Surrey Docks with open water swims, static bikes and flat run/walk routes focused on community and participation.
Triathlon at Dorney Lake on 28 August 2027 offering Sprint, Standard and Super Sprint races plus aquabike and relay options on a flat, chip timed course.
September 2027
One on the Lake Dorney on 5 September 2027 offers triathlon, duathlon, aquabike, aquathlon, open water swims and 5K, 10K and 15K runs with pro timing and medals.
Closed-road triathlon at Willen Lake on 12 September 2027 with Sprint and Standard distances plus aquabike and relay options.
Monthly updates for Dacorum District
Get new running races (and updates) in your inbox every month.
Multi-distance triathlon, aquathlon and aquabike at the H2O Swim Centre lake in Reading on 12 September 2027, featuring open water swims and single loop road cycle routes.
Box End Lakes triathlon on 19 September 2027 offering Sprint, Standard, Odyssey Middle Distance, aquabike and relay options with clear open water swims and marked courses.
Triathlon at Dorney Lake offering Sprint Standard and Super Sprint races plus aquabike and 2 or 3 person relays on a flat, chip timed course.
Pool-based triathlon and aquathlon at Woking Park with multiple junior and adult distances, chip timing, medals and a lapped spectator-friendly run.
October 2027
Multi-distance triathlon and duathlon at Dorney Lake with flat bike and run courses, marked routes, spectator viewing and British Triathlon membership or race pass requirement.
An aquathlon at London Aquatics Centre and Queen Elizabeth Olympic Park featuring a 400 m pool swim followed by a 5 km run around South Park.
November 2027
Sold out November duathlon at Dorney Lake offering Super Sprint, Sprint and Standard distances on a flat, chip timed course at an Olympic venue.