Triathlon Calendar United Kingdom 2026-2027
Monthly updates for United Kingdom
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Explore the best triathlons in United Kingdom for 2026-2027! Our updated list features 234 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.
September 2026
Sun City Tri Aquathlon & Swim Only in Sunderland on 20 September 2026 features a sprint aquathlon and sea swims over 750 m and 1500 m; entries close 10 September and a 5% booking fee applies.
A multisport event at Henley Showground on 20 September 2026 featuring triathlons, aquabikes and open water swims in the River Thames. Entries include chip timing, a finisher medal and a tree planted per entry.
A traffic free triathlon at Eton Dorney on 20 September 2026 offering super sprint, sprint and standard distances for individuals and three‑person teams, with chip timing, water safety cover and on‑site parking.
A club run sprint distance triathlon in Ilkley with a 500 m indoor pool swim, a 14.5 km three lap bike circuit and a 4.8 km run. The event includes team relay entry, poolside facilities and on course catering.
A team relay triathlon at Strathearn Community Campus in Crieff where teams of four each complete a 160 m pool swim, 10 km cycle and 1 km run. Categories are open, female and mixed with mixed teams following a fixed order.
A triathlon festival at Gordonstoun School on 20 Sep 2026 organised by Moray Firth Triathlon Club, featuring a sprint triathlon and limited Aquabike entries with electronic timing and age rules from 15 years.
Triathlon at Dorney Lake on 26 September 2026 with Super Sprint, Sprint and Standard distances, plus Aquabike and relay options. The event supports Macmillan Cancer Support and features chip timed results, race photos and an event village.
Triathlon at Dorney Lake with Super Sprint, Sprint, Standard, aquabike and relay options around a flat Olympic rowing venue; the event is draft illegal and requires British Triathlon membership or a race pass.
ATW Grafham Triathlon at Grafham Water features sprint and standard formats with open water swim loops, a flat out and back bike and a 5 km lap run around the dam. Aquabike and relay options plus wetsuit hire and overnight options are available.
A sea swim in Mumbles Bay, a hilly bike around the Gower Peninsula and a fast flat seafront run. Two distances are offered on 26 September 2026 and the event is an Ocean Lava qualifier.
A multisport weekend at Hever Castle in Kent with triathlon, duathlon, aquabike, aquathlon, swim and run races across several distances, a large junior triathlon and a festival village. Alzheimer's Research UK is the event charity.
Mumbles Duathlon is an end of season sprint event in 2026 featuring a 5k run, 32k bike and 5k run on a fast flat run course. GPX files and a race pack are provided and a payment plan is available for the £75 entry.
A knockout swimrun at Princes Dock in Liverpool Waters with up to six laps and a potential 15 km total. The event features separate male and female lap formats, fixed lap cut-off times, pontoon entries and concrete ramp swim exits.
A pool-based sprint triathlon and aquathlon in Mid Argyll with a flat course along the Crinan Canal, pool swims at the refurbished MAC, and routes past Mhoine Mhor and Dunadd hill fort. Affiliated to Triathlon Scotland.
Triathlon at Axholme Leisure Centre on 27 September 2026 with Sprint, Super Sprint relay teams and an Aquabike category. The event is organised by Animis Racing Team and all finishers receive a medal.
A duathlon at the House of Dun in Montrose featuring off-road runs (5.6 km and 3.8 km) and a 25.8 km bike on quiet country roads, limited to 120 entrants.
A solo timed lap swimrun at Grafham Water on 27 September 2026, using a 2.5k lap with two swim sections and three run sections per lap. Lap time allowances shrink as the race progresses so entrants complete as many laps as they can.
A sprint triathlon and a duathlon at Poynton Leisure Centre on 27 September 2026 featuring a 400 m pool swim, an approximately 20 km bike and 5 km run, chip timing and British Triathlon licensing.
Late season triathlon at East Leake Leisure Centre offering sprint distance triathlon plus aquabike, aquathlon and relay options. The event includes a 400 m pool swim, a 22 km on road bike and a 5 km mixed surface run with chip timing.
A sprint triathlon in Kendal with a 400 m pool swim, an 18.7 km bike with a neutral zone, and a 5 km off-road run to the castle ruins.