East of England
Triathlon Calendar East of England 2026-2027
Monthly updates for East of England
Get new running races (and updates) in your inbox every month.
Explore the best triathlons in East of England for 2026-2027! Our updated list features 21 exciting races across the region. Find your next race in East of England below and join the running community at these great events!
September 2026
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.
Timed solo swimrun at Grafham Water with repeated 2.5 km laps, two swims and three runs per lap, decreasing time limits and up to 12 laps totaling 30 km.
October 2026
Reef Triathlon is a Super Sprint event featuring a 300 m pool swim, a 17 km cycle and a 3 km run held in early October.
Duathlon at Grafham Water on 25 October 2026 with Standard and Sprint distances, a 2.5 km dam lap and an out and back bike route to St Neots. Races are draft illegal and supervised by British Triathlon motor officials.
March 2027
A spring duathlon in Ely with two 4 km runs and a 26 km bike across a flat fenland course and a former WW2 airfield.
Monthly updates for East of England
Get new running races (and updates) in your inbox every month.
May 2027
Sprint triathlon at Dereham Leisure Centre on 02 May 2027 featuring a 300 m pool swim, 21 km bike and 5 km run alongside a Health and Wellbeing Fair.
Open-water triathlon at Riverside Park, St Neots offering Super Sprint, Sprint, Standard, Aquabike and relay on a non-drafting course.
Multi-discipline event at Hanningfield Reservoir near Chelmsford featuring sprint and standard triathlons, aquabikes and open water swim with live chip timing and free parking.
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.
A Metric Centurion 100 km triathlon at Box End Lakes on 23 May 2027 featuring a 2.2 km swim, 81 km bike and 20 km offroad run with aquabike and relay options.
Triathlon at Box End Lakes on 23 May 2027 offering Sprint, Standard and Centurion distances. Options include aquabike, two to three person relays, non-draft multi-lap courses and on-site camping.
June 2027
ATW Grafman is a middle distance triathlon at Grafham Water with a 1.9 km swim, 90 km bike and 21 km run plus aquabike and relay options.
Norwich Triathlon in Norwich offers sprint, standard, relay and First Triathlon races; the 2027 event is scheduled for June 13 and entries will open soon.
July 2027
A multisport weekend at Holkham Hall with a middle distance triathlon, aquabike, gravel sprint, 10k and youth races plus on site camping.
Five-distance triathlon at Hitchin Outdoor Pool and Butts Close, from children's Nano races to the Olympic distance, with timing, t-shirt and finisher medal included.
A coastal triathlon in Southend-on-Sea on 11 July 2027 offering sprint, standard, aquabike, team relay and duathlon options with chip timing and water safety cover.
Triathlon at Riverside Park St Neots with river swim, road bike and riverside run; Sprint and Standard distances plus aquabike and relay options.
Teams of three each complete a 750m swim, 23km bike and 5km run in relay format at Box End Park with categories and prizes for top teams.
August 2027
Triathlon and multisport festival in St Neots on 7 August 2027 with distances from sprint to full, a 12 hour run, relay options and family festival features.
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.