Triathlon Calendar United Kingdom 2026-2027
Monthly updates for United Kingdom
Get new running races (and updates) in your inbox every month.
Explore the best triathlons in United Kingdom for 2026-2027! Our updated list features 227 exciting races across the country. Find your next race in United Kingdom below and join the running community at these great events! Search for a location or view races near London, Birmingham, Glasgow, Liverpool, Scotland or Wales.
August 2027
Multi-distance triathlon at Hartlepool Marina on 8 Aug 2027 with Sprint and Standard options, aquabike, relays and an open water swim on flat coastal courses.
Conquer the highest peak in Wales through a 36 km multi-activity journey involving cycling, trekking to the summit of Snowdon, and kayaking across Llyn Padarn in a single day.
A full distance IRONMAN in Leeds with a lake swim, hilly Yorkshire bike course and a run around Roundhay Park, and a 2025 Athletes' Choice award winner.
A town centre triathlon in Bedford on 15 August 2027 offering Olympic and Sprint formats with river swims, country bike routes and multi-lap Embankment runs.
A triathlon event at Blithfield Reservoir on 15 August 2027 with a 1.5K swim, two-lap bike course and mixed trail road run.
Monthly updates for United Kingdom
Get new running races (and updates) in your inbox every month.
A two day triathlon festival in London on 21 and 22 August 2027 featuring a 100 km T100 race plus Olympic, Sprint and Super Sprint formats and relay options.
A gravel triathlon in the Arrochar Alps on August 21, 2027 featuring a 1.8 km loch swim, a 50 km gravel ride with nearly 2000 m ascent, and a 25 km mountain run.
Pool swims with flat, fully closed bike and run laps at York Sport Village, offering sprint, super sprint, relay and a CRUK fundraising wave.
The Geordieman offers full and half distance triathlons at Druridge Bay Country Park with open water swims, coastal cycling and lake side running routes.
Triathlon at Bishopton Lake with shallow open-water swims, fast road cycling including short climbs, and a lapped trail run with spectator-friendly views.
A multisport event at Edge Hill University with a pool swim, 21 km bike and 5 km run, offering triathlon, duathlon, aquabike and aquathlon options.
Supertri Brighton on 29 August 2027 features Supersprint, Sprint and Olympic triathlon distances on a fast, flat, traffic free seafront course from Hove Lawns along the Promenade.
September 2027
A long-running sprint triathlon in Newbury with a 300 m swim, 22 km open road cycle and 5 km canal run; 40th edition on 5 September 2027.
Devon Adventure Triathlon 10 to 12 Sept 2027 in Westward Ho! combines a 3 mile kayak, 40 mile cycle and 13 mile run with accommodation and charity fundraising.
Weekend multisport event at Ullswater combining SUP, road cycling and trail running with two distance options and free SUP lessons on Saturday.
A 100-mile multisport coast-to-coast across the Scottish Highlands combining trail running, cycling and a one-mile kayak, offered as a one-day or two-day challenge.
Pool swim triathlon at Newport International Sports Village with sprint and Olympic distances, flat bike and run routes, and spectator seating.
Sundowner Triathlon at Allerthorpe Lakeland Park features swim, bike and run options across sprint, Olympic and 70.3 distances with on-site support and event facilities.
Pool to promenade triathlon in Fleetwood with a 400m pool swim, 20km closed road bike and a flat 5km sea wall run.
Triathlon y Bala at Llyn Tegid offers Sprint, Standard and Legend 70.3 distances with lake swims, closed road cycling and support for Tom Harrison House.