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 283 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.
May 2027
Triathlon and multisport event at Southport Marine Lake on 16 May 2027 offering sprint and standard distances with open water swims, coastal bike routes and pathway runs.
Triathlon at Arundel Lido on 16 May 2027 with Standard and Sprint options, heated 25m pool swims, a rolling bike course and run routes near the castle.
Multisport festival at Dorney Lake on 16 May 2027 featuring triathlon, duathlon, aquabike, open water swims and 5K to 15K runs, entry from £25.
Triathlon festival in Banbury on 16 May 2027 with a 50m outdoor heated pool, multiple race formats and a 20 km undulating bike route.
Team relay triathlon at Box End Lakes with three team categories, a 350 m swim, 7.7 km bike and 1 km run; single entries can be assigned to teams.
Monthly updates for United Kingdom
Get new running races (and updates) in your inbox every month.
A weekend of triathlon races at the National Water Sports Centre in Nottingham, featuring sprint, half, aquabike and junior runs with an event village and grandstand.
A swimrun knockout at Princes Dock with up to six laps, timed cutoffs per lap, steep ramp transitions and a 50-place entry limit.
A city-centre sprint triathlon in Swansea with a 750 m dock swim, flat 20 km bike over three laps and a 5 km waterfront run.
A 100 km Metric Centurion triathlon at Box End Lakes featuring a 2.2 km swim, 81 km non-drafting bike and 20 km offroad run with aquabike and relay options.
Triathlon at Box End Lakes with Sprint, Standard and Centurion distances plus aquabike and relay options on clear lake water and a multi lap course.
A multisport festival in Skipton on 23 May 2027 offering junior triathlons, an adult sprint and relay, plus 60km and 100km cycling sportives and a festival hub.
Lake triathlon at Trifarm near Chelmsford offering Sprint and Super Sprint formats with an 18 km hilly bike that includes North Hill.
Triathlon at Marl Pits Leisure Centre on 23 May 2027 featuring a 400 m pool swim, 21 km undulating bike and a lapped 5 km run, offered as solo or relay.
Triathlon at Marazion Beach with a sea swim by St Michael's Mount, flat bike lanes and a sea-front run, offering distances from Super Sprint to the 70.3 middle distance.
Triathlon at Higginson Park on 30 May 2027 with Middle Distance, Olympic and Sprint races, a Thames swim and road bike and run courses.
Multisport event at Higginson Park in Marlow featuring triathlon, duathlon, aquabike, aquathlon and 750m 1500m 3000m open water swims with chip timed results and finisher medals.
A 400 m pool swim, 23 km bike past Westonbirt Arboretum and a traffic-free 5 km run finishing at Westonbirt House; places limited to 500.
June 2027
Midweek triathlon at Dorney Lake with Super Sprint, Sprint, aquabike and relay options on a flat course in an Olympic venue; British Triathlon membership is required.
Triathlon at Blenheim Palace on 5–6 June 2027 with SuperSprint and Sprint distances, a lake swim, closed road bike course and a finish line festival.
A coastal triathlon in Fishguard on 05 June 2027 offering Middle, Olympic and Sprint distances with a sheltered harbour swim and open road bike sections.