UK Triathlon Events

An OTILLO Merit Race swimrun along the Gower coastline with Full (~21km), Gritty and Sprint options combining coastal swimming and trail running.

Award-winning sprint triathlon with open water swim in the tidal River Coquet below Warkworth Castle. Triathlon England Small Event of the Year 2025.

Long Course Weekend Wales in Tenby combines swimming, cycling, and running across a stunning coastal course — a multi-sport festival for athletes of all levels.

Sprint triathlon with sea swim, closed-road coastal cycle and promenade run. Hosts the 2026 Welsh National Sprint Championship.

Weekend triathlon and duathlon on Lake Windermere. Novice (350m swim), Sprint (750m swim) and Standard (1500m swim) distances plus duathlon options.

Standard-distance triathlon at Broad Haven beach doubling as the Welsh National Standard Distance Championship.

Sprint triathlon and aquathlon in Mold, North Wales. Suitable for all abilities with swim, bike and run legs.

Charity dragon boat regatta on Lake Windermere hosted by YMCA Lakeside. Teams race in a fun fundraising day on the lake.

Triathlon festival on Loch Lomond with multiple distances, part of the Triathlon Scotland National Series.

Multi-sport festival at Llyn Padarn with sprint/standard/legend triathlons, aquabike (Welsh National Championship) and standalone 1500m swim. One of Wales’ toughest triathlons.

Sprint triathlon incorporating the Scottish National Sprint Championship with open water sea swim, coastal bike and beach park run.

Cornwall’s biggest surf & music festival. Surfing competition at Fistral Beach, music at Watergate Bay. Kasabian, Fatboy Slim, The Kooks headlining.

One of England’s oldest seaside regattas with yacht and rowing races, parades, airshows and fireworks over three days in Whitby Harbour.

Iconic middle distance triathlon — 1.9km swim in Loch Tay, 90km bike through Highland Perthshire, and 21km run. Part of the Triathlon Scotland National Series.

Summer edition at Edge Hill University with new aquabike option (400m swim / 21k bike). Highly rated for first-time triathletes.

10th anniversary Geordieman half-triathlon with open water swim in Ladyburn Lake, scenic coastal bike and flat run. Solo and relay options.

Major South Coast triathlon with Sprint and Standard distances plus Aquathlon and Aquabike options, featuring a sea swim off Bournemouth’s blue-flag beach.

Off-road adventure triathlon with open water swim in Loch Morlich, mountain biking and trail running through Glenmore Forest in the Cairngorms.

The flagship IRONMAN 70.3 in the South West — 1.2-mile ocean swim, 56-mile bike through Dorset countryside, and 13.1-mile run along Weymouth seafront.

400m pool swim in the London 2012 Aquatics Centre followed by a 5km run through the Olympic Park.