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 22 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
Nettleden Duathlon on 12 September 2026 at Nettleden Lodge near Berkhamsted features a 6 km run, 24 km cycle and 6 km run with individual and relay options plus kids races and fundraising.
Trifarm Sprint Triathlon Equinox on 13 September 2026 features a lake swim, an 18 km bike over North Hill and a 5 km perimeter run with a Super Sprint option.
Riverside triathlon in St Neots on 20 September 2026 offering sprint to middle distances, open water swim, camping, wetsuit hire and relay options.
Pool-based super sprint triathlon in Bungay with a 400m swim, 20km bike and 3.2km run, limited to 170 places and open to ages 15 to 99.
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.
Monthly updates for East of England
Get new running races (and updates) in your inbox every month.
Timed solo swimrun at Grafham Water with repeated 2.5 km laps, two swims and shrinking time limits until the last person remains.
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.
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.
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 triathlon relay at Box End Lakes with 350 m swim, 7.7 km bike and 1 km run per athlete, offering team and single entry options and on site camping.
A 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.
July 2027
A multisport weekend at Holkham Hall in early July featuring a middle distance triathlon, aquabike, gravel sprint, 10k, youth races, camping and an Event Village.
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 offering sprint, standard, aquabike, relay and duathlon options with chip timing, water safety cover and a marked course. The event includes marshals, a secure transition area and a bespoke medal.
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.