Every UK ultra, backyard, triathlon and running race. Checked weekly. List your event free
Search races

Triathlons

113 UK triathlons coming up. Sprint, standard, middle and full distance triathlons, plus duathlons.

Triathlons

Map view
Planning your race? Work out your pace and finish time.Open the calculator

November 2026

2 races
Sun 8 Nov 2026

Dorney Lake Duathlon

Triathlon · Dorney, Buckinghamshire

Duathlon

Sun 22 Nov 2026

Dunham Massey Duathlon

Triathlon · Altrincham, Greater Manchester

Duathlon

December 2026

1 race
Sun 13 Dec 2026

Sherwood Pines Festive Duathlons

Triathlon · Edwinstowe, Nottinghamshire

Duathlon

January 2027

1 race
Fri 1 Jan 2027

New Year's Day Triathlon

Triathlon · Edinburgh, City of Edinburgh

Sprint

March 2027

6 races
Sun 7 Mar 2027

Pembrokeshire Duathlon

Triathlon · Neyland, Pembrokeshire

Duathlon

Sun 21 Mar 2027

Druridge Bay Duathlon

Triathlon · Hadston, Northumberland

Duathlon

Sun 21 Mar 2027

Lake District Duathlons - Grasmere

Triathlon · Grasmere, Cumbria

Duathlon

Sun 21 Mar 2027

Margam Park Duathlon

Triathlon · Margam, Neath Port Talbot

Duathlon

Sun 21 Mar 2027

Oulton Park Duathlon

Triathlon · Little Budworth, Cheshire

Duathlon

Sun 21 Mar 2027

TriWorks East Fortune Duathlon

Triathlon · East Fortune, East Lothian

Duathlon

April 2027

10 races
Sun 4 Apr 2027

East Leake Pool Sprint Triathlon

Triathlon · East Leake, Nottinghamshire

Sprint

Sun 4 Apr 2027

Scone Palace Duathlons

Triathlon · Perth, Perth and Kinross

Duathlon

Sun 4 Apr 2027

Yorkshire Duathlons - Bramham Park

Triathlon · Wetherby, West Yorkshire

Duathlon

Sat 17 Apr 2027

Bamburgh Castle Duathlons

Triathlon · Bamburgh, Northumberland

Duathlon

Sun 18 Apr 2027

Garden of Wales Duathlon

Triathlon · Llanarthney, Carmarthenshire

Duathlon

Sun 25 Apr 2027

Bishopbriggs Triathlon

Triathlon · Bishopbriggs, East Dunbartonshire

Sprint

Sun 25 Apr 2027

Early Brigg Sprint Triathlon

Triathlon · Brigg, North Lincolnshire

Sprint

Sun 25 Apr 2027

Roade Sprint Triathlon

Triathlon · Roade, Northamptonshire

Sprint

25–26 Apr 2027

The First Tri Lydney

Triathlon · Lydney, Gloucestershire

Sprint · Standard

Date TBC · est. Apr 2027

XTERRA Weston Park

Triathlon · Weston-under-Lizard, Staffordshire

Sprint · Standard · Duathlon

May 2027

14 races
Sun 2 May 2027

ATW St Neots Triathlon

Triathlon · St Neots, Cambridgeshire

Sprint · Standard

Mon 3 May 2027

Tonbridge Triathlon

Triathlon · Tonbridge, Kent

Sprint · Standard · Duathlon

Sun 9 May 2027

Llanelli Agilis Sprint Triathlon

Triathlon · Llanelli, Carmarthenshire

Sprint

Sat 15 May 2027

Essex Triathlons - Hanningfield Reservoir

Triathlon · South Hanningfield, Essex

Sprint · Standard

Sun 16 May 2027

51fiver Cotswold Standard Distance Triathlon

Triathlon · South Cerney, Gloucestershire

Standard

Sun 16 May 2027

Arundel Lido Triathlon

Triathlon · Arundel, West Sussex

Sprint · Standard

Sun 16 May 2027

Grantown Try Tri

Triathlon · Grantown-on-Spey, Highland

Sprint

Sun 16 May 2027

Southport Triathlon & Multisport

Triathlon · Southport, Merseyside

Sprint · Standard · Duathlon

Sat 22 May 2027

Glasgow Triathlon

Triathlon · Glasgow, Glasgow City

Sprint

22–23 May 2027

Outlaw Nottingham Weekend (Outlaw Half)

Triathlon · Nottingham, Nottinghamshire

Sprint · Middle

Sun 23 May 2027

ATW Box End Triathlon

Triathlon · Kempston, Bedfordshire

Sprint · Standard · Middle

Sun 23 May 2027

Swansea Triathlon

Triathlon · Swansea

Sprint

Sat 29 May 2027

The Kernowman (Marazion Triathlon)

Triathlon · Marazion, Cornwall

Sprint · Standard · Middle

Sun 30 May 2027

Marlow Triathlon

Triathlon · Marlow, Buckinghamshire

Sprint · Standard · Middle

June 2027

27 races
5–6 Jun 2027

Blenheim Palace Triathlon (Supertri)

Triathlon · Woodstock, Oxfordshire

Sprint

Sat 5 Jun 2027

Wales Triathlon

Triathlon · Fishguard, Pembrokeshire

Sprint · Standard · Middle

Sun 6 Jun 2027

ATW Grafman Middle Distance Triathlon

Triathlon · Grafham, Cambridgeshire

Middle

Sold out
Sun 6 Jun 2027

IRONMAN 70.3 Bolton

Triathlon · Bolton, Greater Manchester

Middle

Sun 6 Jun 2027

Plymouth Triathlon

Triathlon · Cremyll, Cornwall

Sprint · Standard · Middle

Sun 6 Jun 2027

Weymouth Classic & Sprint Triathlon

Triathlon · Weymouth, Dorset

Sprint · Standard

Sat 12 Jun 2027

BTT Brighton

Triathlon · Brighton, East Sussex

Sprint · Standard

Date TBC · est. Jun 2027

Beyond the Wall Triathlon

Triathlon · Strangford, County Down

Sprint

Sat 12 Jun 2027

Celtman Extreme Scottish Triathlon

Triathlon · Torridon, Highland

Full

Sat 12 Jun 2027

Dorney Triathlon

Triathlon · Dorney, Buckinghamshire

Sprint · Standard

12–13 Jun 2027

Northumberland Festival of Sport

Triathlon · Hadston, Northumberland

Sprint · Standard

12–13 Jun 2027

The Wild Boar 70.3 and Olympic Triathlon

Triathlon · Cinderford, Gloucestershire

Sprint · Standard · Middle

Sat 12 Jun 2027

Titan Brecon Middle Distance Triathlon

Triathlon · Tredegar, Blaenau Gwent

Middle

Sun 13 Jun 2027

Dartmouth Triathlon

Triathlon · Blackpool Sands, Devon

Sprint · Standard

Sun 13 Jun 2027

Norwich Triathlon

Triathlon · Norwich, Norfolk

Sprint · Standard

Sun 13 Jun 2027

Royal Windsor Triathlon

Triathlon · Windsor, Berkshire

Sprint · Standard

Sun 13 Jun 2027

Slateman Triathlon & Duathlon

Triathlon · Llanberis, Gwynedd

Sprint · Standard · Savage

Sat 19 Jun 2027

Abersoch Triathlon

Triathlon · Abersoch, Gwynedd

Sprint · Standard

Sat 19 Jun 2027

Shropshire Triathlon

Triathlon · Ellesmere, Shropshire

Sprint · Standard

Sun 20 Jun 2027

Dambuster Triathlon

Triathlon · Exton, Rutland

Sprint · Standard

Sun 20 Jun 2027

Pembrokeshire Coast Triathlon

Triathlon · Broad Haven, Pembrokeshire

Standard

Sun 20 Jun 2027

Sheffield Triathlon & Duathlon

Triathlon · Sheffield, South Yorkshire

Sprint · Duathlon

Sun 20 Jun 2027

The Lakesman Triathlons

Triathlon · Keswick, Cumbria

Middle · Full

Sun 20 Jun 2027

Ultimate Triathlon 150 / 100 / 50

Triathlon · Ellesmere, Shropshire

Standard · Middle

26–27 Jun 2027

Castle Race Series - Cholmondeley Castle

Triathlon · Cholmondeley, Cheshire

Sprint · Standard · Middle

Sun 27 Jun 2027

Llandudno Triathlon & Duathlon

Triathlon · Llandudno, Conwy

Sprint · Standard · Duathlon

Sun 27 Jun 2027

The Original Swanage Triathlon Festival

Triathlon · Swanage, Dorset

Sprint · Standard

July 2027

17 races
3–4 Jul 2027

Outlaw Holkham Weekend (Outlaw Half Holkham)

Triathlon · Wells-next-the-Sea, Norfolk

Sprint · Middle

Sun 4 Jul 2027

Derwent Reservoir Triathlons

Triathlon · Consett, County Durham

Sprint · Standard · Duathlon

Sun 4 Jul 2027

Hitchin Triathlon

Triathlon · Hitchin, Hertfordshire

Sprint · Standard

10–11 Jul 2027

Ripon Triathlon Festival

Triathlon · Ripon, North Yorkshire

Sprint · Standard

Sat 10 Jul 2027

Upton Tri + Duathlon

Triathlon · Upton upon Severn, Worcestershire

Sprint · Standard · Duathlon

10–11 Jul 2027

Windermere Triathlons & Duathlons

Triathlon · Bowness-on-Windermere, Cumbria

Sprint · Standard · Duathlon

Sun 11 Jul 2027

Croyde Ocean Triathlon

Triathlon · Croyde, Devon

Sprint · Standard

Sun 11 Jul 2027

IRONMAN 70.3 Swansea

Triathlon · Swansea

Middle

Sun 11 Jul 2027

Southend Triathlon

Triathlon · Southend-on-Sea, Essex

Sprint · Standard · Duathlon

17–18 Jul 2027

Castle Race Series - Belvoir Castle

Triathlon · Belvoir, Leicestershire

Sprint · Standard · Middle

Sun 18 Jul 2027

Carlisle Triathlon

Triathlon · Carlisle, Cumbria

Sprint

Sun 18 Jul 2027

The Felixstowe Triathlon

Triathlon · Felixstowe, Suffolk

Sprint · Standard

Date TBC · est. Jul 2027

Woodhorn Museum Triathlon

Triathlon · Ashington, Northumberland

Sprint · Standard

Sat 24 Jul 2027

Castle to Coast Triathlon

Triathlon · Windsor, Berkshire

Middle

Sat 24 Jul 2027

Loch Lomond Beastie Triathlon Festival

Triathlon · Balloch, West Dunbartonshire

Sprint

24–25 Jul 2027

Outlaw Original Weekend

Triathlon · Nottingham, Nottinghamshire

Sprint · Middle · Full

Sun 25 Jul 2027

Snowman Triathlon & Duathlon

Triathlon · Capel Curig, Conwy

Sprint · Standard · Middle

August 2027

16 races
Sun 1 Aug 2027

ATW Bristol Triathlon

Triathlon · Bristol

Sprint · Standard

Sun 1 Aug 2027

Salford Triathlon & Aquabike

Triathlon · Salford, Greater Manchester

Sprint · Standard

Sat 7 Aug 2027

ATW First to Full Triathlon Festival

Triathlon · St Neots, Cambridgeshire

Sprint · Standard · Middle

Sun 8 Aug 2027

The Big Lime Triathlons - Hartlepool Marina

Triathlon · Hartlepool, County Durham

Sprint · Standard

Sun 15 Aug 2027

Bedford Triathlon

Triathlon · Bedford, Bedfordshire

Sprint · Standard

Sun 15 Aug 2027

Blithfield Olympic Triathlon & Aquabike

Triathlon · Abbots Bromley, Staffordshire

Standard

Sun 15 Aug 2027

IRONMAN Leeds

Triathlon · Leeds, West Yorkshire

Full

Sun 15 Aug 2027

Thorpe Park Sprint Triathlon

Triathlon · Chertsey, Surrey

Sprint

21–22 Aug 2027

London T100 (age-group races)

Triathlon · London, Greater London

Sprint · Standard · Middle

Sat 21 Aug 2027

The Restless Xtreme Gravel Triathlon

Triathlon · Lochgoilhead, Argyll and Bute

Middle

Sun 22 Aug 2027

Bishopton Triathlon

Triathlon · Stockton-on-Tees, County Durham

Sprint · Standard

Sun 22 Aug 2027

The Geordieman

Triathlon · Morpeth, Northumberland

Middle · Full · Duathlon

Sun 22 Aug 2027

York Triathlon

Triathlon · York, North Yorkshire

Sprint

Sat 28 Aug 2027

Staffin Triathlon & 10K

Triathlon · Staffin, Highland

Sprint

Sun 29 Aug 2027

Supertri Brighton (Brighton & Hove Triathlon)

Triathlon · Hove, East Sussex

Sprint · Standard

Sun 29 Aug 2027

Wimbleball Lake Triathlon

Triathlon · Dulverton, Somerset

Sprint · Standard · Middle

September 2027

18 races
Sat 4 Sep 2027

Ellesmere Triathlon

Triathlon · Ellesmere, Shropshire

Sprint · Standard · Middle

Sat 11 Sep 2027

Newport Sprint & Olympic Pool Triathlon

Triathlon · Newport

Sprint · Standard

Date TBC · est. Sep 2027

Sundowner Triathlon

Triathlon · Pocklington, East Riding of Yorkshire

Sprint · Standard · Middle

Sun 12 Sep 2027

ATW Milton Keynes Triathlon

Triathlon · Milton Keynes, Buckinghamshire

Sprint · Standard

Date TBC · est. Sep 2027

Aviemore Triathlon

Triathlon · Aviemore, Highland

Sprint · Standard

Date TBC · est. Sep 2027

Bournemouth International Triathlon

Triathlon · Bournemouth, Dorset

Sprint · Standard

Date TBC · est. Sep 2027

IRONMAN 70.3 Weymouth

Triathlon · Weymouth, Dorset

Middle

Sun 12 Sep 2027

Reading Triathlon

Triathlon · Reading, Berkshire

Sprint · Standard

Sun 12 Sep 2027

The Cheltenham Tri Festival

Triathlon · Cheltenham, Gloucestershire

Sprint · Standard

Sun 12 Sep 2027

The Vitruvian Triathlon

Triathlon · Exton, Rutland

Middle

Date TBC · est. Sep 2027

Triathlon y Bala

Triathlon · Bala, Gwynedd

Sprint · Standard · Middle

Date TBC · est. Sep 2027

Saundersfoot Triathlon

Triathlon · Saundersfoot, Pembrokeshire

Sprint

18–19 Sep 2027

The Brutal Extreme Triathlons

Triathlon · Llanberis, Gwynedd

Standard · Middle · Full

Sun 19 Sep 2027

Falmouth Triathlon (The Seal)

Triathlon · Falmouth, Cornwall

Sprint

Date TBC · est. Sep 2027

IRONMAN Wales

Triathlon · Tenby, Pembrokeshire

Full

Sat 25 Sep 2027

ATW Grafham Triathlon

Triathlon · Grafham, Cambridgeshire

Sprint · Standard

25–26 Sep 2027

Castle Race Series - Hever Castle

Triathlon · Hever, Kent

Sprint · Standard · Middle

Sun 26 Sep 2027

Sandman Triathlon & Duathlon

Triathlon · Newborough, Isle of Anglesey

Sprint · Standard · Middle

October 2027

1 race
Sat 23 Oct 2027

London Aquathlon

Triathlon · London, Greater London

400m swim / 5K run

By distance

Sprint triathlons81 racesMiddle distance triathlons32 racesFull distance triathlons8 races

By region

Scotland11North East8North West10Yorkshire7East Midlands8West Midlands6East of England12London2South East14South West15Wales19Northern Ireland1

About triathlons

From your first pool-based sprint to a full 140.6, the UK has a triathlon for every level. Distances are usually sprint (750m swim, 20km bike, 5km run), standard or Olympic (1.5km, 40km, 10km), middle (1.9km, 90km, 21.1km) and full (3.8km, 180km, 42.2km). Every event below links straight to entry.

Read the full guide

What is a sprint triathlon?
Usually a 750m swim, 20km bike and 5km run. Pool sprints often use a shorter 400m swim and are a great first race.
Do I need a wetsuit?
For open water events in the UK, wetsuits are normally compulsory below a set water temperature. Pool triathlons don't need one.
Do I need a British Triathlon licence?
No, but unlicensed athletes usually pay a small day licence fee on top of the entry price.
Can I do a triathlon on a mountain bike or hybrid?
Yes, most sprint events welcome any road-legal bike in working order, with a helmet that meets safety standards.