Best full-distance triathlons in the United Kingdom

7 rated races, ranked by an overall score built from racer reviews and race reports. How we rate

Full distance

7 races

  • Race photo: TriBourne (IronBourne) Full Distance, Eastbourne

    1. TriBourne (IronBourne) Full Distance, Eastbourne

    Eastbourne, United Kingdom

    Next race 11 Jul 2027

    Overall score 4.5
    Excellent
    #6 of 116

    Strong evidence · 12 sources

    Best
    Race 4.6
    Weakest
    Bike 3.7
  • Race photo: IRONMAN Wales

    2. IRONMAN Wales

    Tenby, United Kingdom

    Next race 19 Sep 2027

    Overall score 4.3
    Very good
    #10 of 116

    Moderate evidence · 8 sources

    Water 15–18 °C (59–64 °F)

    Water
    15–18 °C (59–64 °F)
    Air
    14–20 °C (57–68 °F)
    Bike climb
    2,450 m (8,040 ft)
    Field
    about 2,400
    Best
    Race 4.5
    Weakest
    Swim 3.2
  • Race photo: Outlaw Triathlon (Original, Nottingham)

    3. Outlaw Triathlon (Original, Nottingham)

    Nottingham (Holme Pierrepont), United Kingdom

    Next race 25 Jul 2027

    Overall score 4.0
    Very good
    #17 of 116

    Strong evidence · 13 sources

    Water 18–20 °C (64–68 °F)

    Water
    18–20 °C (64–68 °F)
    Air
    14–24 °C (57–75 °F)
    Field
    about 1,500
    Best
    Race 4.5
    Weakest
    Bike 2.5
  • Race photo: IRONMAN Leeds

    4. IRONMAN Leeds

    Leeds, United Kingdom

    Last race 16 Aug 2026

    Overall score 3.6
    Very good
    #39 of 116

    Strong evidence · 10 sources

    Water 21 °C (70 °F)

    Water
    21 °C (70 °F)
    Air
    12–19 °C (54–66 °F)
    Bike climb
    2,574 m (8,440 ft)
    Field
    about 1,000
    Best
    Swim 4.1
    Weakest
    Race 3.1
  • Race photo: Wimbleball Iron Distance Triathlon

    5. Wimbleball Iron Distance Triathlon

    Brompton Regis (Wimbleball Lake), United Kingdom

    Next race 29 Aug 2027

    Overall score 3.3
    Good
    #60 of 116

    Moderate evidence · 6 sources

    Bike climb 3,280 m (10,760 ft)

    Bike climb
    3,280 m (10,760 ft)
    Best
    Swim 4.2
    Weakest
    Bike 2.8
  • Race photo: Celtman Extreme Triathlon

    6. Celtman Extreme Triathlon

    Torridon / Shieldaig, United Kingdom

    Next race 12 Jun 2027

    Overall score 3.3
    Good
    #65 of 116

    Moderate evidence · 9 sources

    Water 10–12 °C (50–54 °F)

    Water
    10–12 °C (50–54 °F)
    Air
    8–18 °C (46–64 °F)
    Bike climb
    2,200 m (7,220 ft)
    Field
    about 220
    Best
    Race 4.2
    Weakest
    Stay and travel 1.8
  • Race photo: ATW Odyssey Full Distance Triathlon

    7. ATW Odyssey Full Distance Triathlon

    St Neots, United Kingdom

    Last race 8 Aug 2026

    Overall score 3.2
    Good
    #66 of 116

    Thin evidence · 3 sources

    Air
    13–24 °C (55–75 °F)
    Best
    Stay and travel 4.3
    Weakest
    Bike 2.2
About these ratings

Races are ranked by an overall score out of 5, built from racer reviews and race reports, on the race itself, swim, bike, run, conditions and travel. 5 is always the better end. How we rate

Full distance course: 3.8 km (2.4 mi) swim, 180 km (112 mi) bike, 42.2 km (26.2 mi) run.

Reports on full-distance races are scarcer, so 1 of 8 scores are thin evidence: fewer than 5 sources each (dashed score, marked provisional). Show only races with 5+ sources.

1 race is paused or discontinued and hidden until you turn off “Active races only” in All filters.

66 racer reviews and race reports.

Browse all 8 races, A to Z

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