Triathlon Events in United Kingdom 🇬🇧 2026 — Calendar

24 Upcoming triathlon events listed in United Kingdom from May 2026 to November 2027 with the most events in England (21), Scotland (1) and Wales (1), including Ironman 70.3 Bolton and Outlaw Holkham 70.3.

37 Athletes targeting these events on Intervals.icu

Blenheim Palace Weekend Warrior

Oxfordshire, UK Swim Ride Run

Dorney Lake Standard Triathlon

08:30 am 99 GBP

Dorney Lake, Windsor, UK Run Ride Swim

Bolton Ironman

Bolton, UK Swim Ride Run

Cotswold 113

Spine Rd E, Cirencester GL7 5FP, UK Run Ride Swim

Ironman 70.3 Bolton

Ironman 70.3 Bolton 2026

Bolton, UK Swim Ride Run

BUCS STANDARD TRI

Norwich, UK Open Water Swim Ride Run

Oxford Sprint Triathlon 2026

Queenford Lake, Burcot Ln, Garden Village, Berinsfield, Wallingford OX10 7PQ, UK Ride Run Open Water Swim

Outlaw Holkham 70.3

XR9R+2X, Wells-next-the-Sea NR23 1DR, UK Open Water Swim Ride Run

Dorney Lake Standard Triathlon

Dorney Lake, Windsor, UK Swim Ride Run

Eastbourne triathlon

Eastbourne Beach, 23 Royal Parade, Eastbourne BN22 7LH, UK Open Water Swim Ride Run

IRONMAN 70.3 Swansea

Half Ironman Triathlon

Swansea Bay, United Kingdom Swim Ride Run

Dorney Lake Standard Triathlon

Dorney Lake, Windsor, UK Swim Ride Run

Outlaw Middle

Nottingham NG12 2LU, UK Ride Run Open Water Swim

T100 - London

Royal Victoria Dock, 1 Western Gateway, London E16 1XL, UK Open Water Swim Ride Run

Irvine Sprint Triathalon

Irvine, UK Open Water Swim Ride Run

Dorney Lake Standard Triathlon

Dorney Lake, Windsor, UK Swim Ride Run

Geordieman 70.3

Druridge Bay, Morpeth NE61 5EF, UK Ride Run Open Water Swim

Dorney Lake Standard Triathlon

Dorney Lake, Windsor, UK Swim Ride Run

NEW FOREST TRIATHLON

Moyles Court, Rockford, Ringwood BH24 3NF, UK Swim Ride Run

Triathlon Y Bala

1.9 km swim 85 km bike 21.1 km run 239.99 until 23/08/2026 259.99 until 04/09/2026

Bala LL23, UK Swim Ride Run

IRONMAN 70.3 Weymouth

Ironman 70.3 Weymouth

Weymouth, UK Ride Run Swim

Dorney Lake Standard Triathlon

Dorney Lake, Windsor, UK Swim Ride Run

Dorney Lake Standard Triathlon

Dorney Lake, Windsor, UK Swim Ride Run

Warwickshire Triathlon

Stratford-upon-Avon CV37, UK Swim Ride Run