Our comprehensive triathlon calendar / triathlon finder for triathlons in United Kingdom.
| Triathlons in United Kingdom (153) | ||||
| Triathlon | City | Month | Map |
Race Type(s) |
| Isle of Bute Triathlon | Rothesay | March | | Sprint | Kids | Relay | | |
| Chirk Triathlon | Chirk | April | | Sprint | | |
| Duston Triathlon | Duston | April | | Sprint | | |
| East Coast Super Sprint Triathlon | Great Yarmouth | April | | Short | | |
| East Fife Sprint Triathlon | Cupar | April | | Sprint | | |
| Hungerford Fast Twitch Triathlon | Hungerford | April | | Sprint | | |
| Skitpon Triathlon | Skipton | April | | Sprint | Relay | | |
| SPW Hyde Park Triathlon | London | April | | Sprint | Relay | | |
| Steyning Triathlon | Steyning | April | | International | Sprint | | |
| Thames Turbo Triathlon Series #1 | Hampton | April | | Sprint | | |
| Tidworth Fast Twitch Triathlon | Tidworth | April | | Sprint | | |
| Beaver Triathlon, The | Belvoir | May | | Long | Olympic | Relay | | |
| Blenheim Triathlon | Woodstock | May | | Sprint | | |
| Cleveland Sprint Triathlon | Acklam | May | | Sprint | | |
| Dorchester Fast Twitch Triathlon | Dorchester | May | | Sprint | | |
| Edinburgh Sprint and Novice Triathlon | Edinburgh | May | | Sprint | Kids | | |
| Eton Super Sprint Triathlon | Eton | May | | Sprint | | |
| Grendon Triathlon | Grendon | May | | Sprint | Relay | | |
| Harlech Triathlon | Harlech | May | | Sprint | | |
| Hatch End - Harrow Triathlon | Hatch End | May | | Sprint | Kids | | |
| Hayle Middle Distance Triathlon | Marazion | May | | Long | Relay | | |
| Hillingdon Triathlon Series #1 | West London | May | | Sprint | | |
| Ineos Swashbuckler Triathlon | Beaulieu | May | | Long | Relay | | |
| Kirkwall Standard Distance Triathlon | Kirkwall | May | | Olympic | | |
| Leicester Triathlon | Desford | May | | Sprint | Relay | | |
| Leybourne Lake Midweek Series #1 | Leybourne | May | | Sprint | | |
| Llanelli Sprint Triathlon | Llanelli | May | | Sprint | | |
| Lydney Triathlon | Lydney | May | | Sprint | | |
| Malvern Sprint Triathlon | Malvern | May | | Sprint | | |
| Marshman, The | Lydd | May | | Half | | |
| New Forest Triathlon | Ellingham | May | | International | Relay | | |
| North Berwick Triathlon | North Berwick | May | | Sprint | | |
| Salisbury Fast Twitch Triathlon | Salisbury | May | | International | | |
| Southwell Sprint Triathlon | Southwell | May | | Sprint | | |
| Stratford 220 Triathlon | Stratford-upon-Avon | May | | Sprint | | |
| Thames Turbo Triathlon Series #2 & #3 | Hampton | May | | Sprint | | |
| Torbay Young Persons Triathlon | Goodrington | May | | Kids | | |
| Try-a-Tri | Cardiff | May | | Sprint | | |
| Waveny Valley Triathlon | Bungay | May | | Short | | |
| Wilmslow Triathlon | Wilmslow | May | | Sprint | Relay | | |
| Woodhall Spa Sprint Triathlon | Woodhall Spa | May | | Sprint | | |
| A Day in the Lakes Middle Distance Triathlon | Pooley Bridge | June | | Half | Relay | | |
| Arundel Triathlon | Arundel | June | | International | Sprint | Relay | | |
| AXLR8 Triathlon | Crowthorne | June | | Sprint | | |
| Ayr Sprint Triathlon | Ayr | June | | Sprint | | |
| Bala Middle Distance Triathlon | Bala | June | | Half | | |
| Braintree District Triathlon | Halstead | June | | Sprint | | |
| Cheshire Triathlon | Nantwich | June | | Sprint | | |
| Cleveland Short Course Triathlon | Scorton | June | | International | | |
| Cosmeston Triathlon | Penarth | June | | Sprint | | |
| Dambuster Triathlon | Whitwell | June | | International | | |
| Dorney Triathlon | Eton | June | | Olympic | International | | |
| Ellesmere Triathlon | Ellesmere | June | | Olympic | Relay | | |
| Fritton Lake Triathlon Festival | Fritton | June | | Olympic | Sprint | Relay | | |
| Hillingdon Triathlon Series #2 | West London | June | | Sprint | | |
| Ineos Beaulieu Triathlon | Beaulieu | June | | Sprint | Relay | | |
| Leybourne Lake Midweek Series #2 | Leybourne | June | | Sprint | | |
| Mansfield Sprint Triathlon | Mansfield | June | | Sprint | | |
| Marlborough Fast Twitch Triathlon | Marlborough | June | | Sprint | Relay | | |
| Mold Sprint Triathlon | Mold | June | | Sprint | | |
| Northampton Classic Tri | Grendon | June | | Olympic | | |
| Outrageous Half | Leybourne | June | | Half | | |
| Rother Valley Triathlon Festival | Sheffield | June | | Olympic | Sprint | Women | Kids | | |
| Royal Windsor Triathlon | Windsor | June | | International | Sprint | | |
| Royles Deva Triathlon | Chester | June | | Olympic | | |
| Stirling Triathlon | Stirling | June | | Sprint | Kids | | |
| Sussex Triathlon | West Sussex | June | | Sprint | Short | | |
| TIMEX WomenOnly Triathlon | Eton | June | | International | Sprint | | |
| TriFest - Sprint Triathlon | Olney | June | | Sprint | | |
| Walden Triathlon | Saffron Walden | June | | Sprint | | |
| Weymouth Middle Distance Triathlon / Sprint Triathlon | Weymouth | June | | Half | Sprint | Relay | | |
| Andover Triathlon | Andover | July | | Sprint | Kids | | |
| BananaMan Triathlon | Eton | July | | International | | |
| Bournemouth International / Sprint Triathlon | Bournemouth | July | | Olympic | Sprint | | |
| Bude Triathlon | Bude | July | | Sprint | | |
| City of Bath Triathlon | Bath | July | | Olympic | Sprint | | |
| Cleveland Steelman Triathlon | Scorton | July | | Half | | |
| Darley Park Sprint Triathlon | Etwall | July | | Sprint | | |
| David Lloyd Lincoln Sprint Triathlon | Lincoln | July | | Sprint | | |
| East Leake Triathlon | East Leake | July | | Sprint | Relay | | |
| Forestman Triathlon | Ellingham | July | | Full | Relay | | |
| Gullane Beach Triathlon | Gullane | July | | Olympic | | |
| Hayle Standard Distance Triathlon | Hayle | July | | Olympic | Relay | | |
| Hillingdon Triathlon Series #3 | West London | July | | Sprint | | |
| Ironbridge Classic Triathlon | Ironbridge | July | | Olympic | Sprint | | |
| Leybourne Lake Midweek Series #3 | Leybourne | July | | Sprint | | |
| Leybourne Lake Midweek Series #4 | Leybourne | July | | Sprint | | |
| Llandudno Sea Triathlon | Llandudno | July | | Olympic | Relay | | |
| Milton Keynes Triathlon | Olney | July | | Olympic | | |
| Mourne Olympian Triathlon | Castlewellan | July | | Olympic | | |
| Norwich Triathlon | Norwich | July | | Olympic | Sprint | Relay | | |
| Plymouth Standard Distance Triathlon | Plymouth | July | | Olympic | Relay | | |
| Race to the Bill Triathlon | Portland | July | | Olympic | | |
| Royles Deva Divas Triathlon | Chester | July | | Women | | |
| Salford Triathlon | Salford | July | | Olympic | Sprint | | |
| Terrapin Sprint Triathlon | Leicester | July | | Sprint | | |
| Totton Triathlon | Totton | July | | Sprint | | |
| Trentham Triathlon | Trentham | July | | Half | Olympic | Sprint | | |
| Wakefield Triathlon | Wakefield | July | | Olympic | | |
| Worthing Triathlon | Worthing | July | | Olympic | Relay | | |
| Big Woody, The | Coleford | August | | Full | Half | Relay | | |
| Buxton Triathlon | Buxton | August | | Sprint | Relay | | |
| Clumber Park Sprint Triathlon | Clumber Park | August | | Olympic | Sprint | | |
| CowMan Triathlon | Olney | August | | Half | | |
| Denbigh Sprint Triathlon | Denbigh | August | | Sprint | | |
| Dextro Energy Triathlon - London | London | August | | Olympic | Sprint | | |
| Hayle Sprint Distance Triathlon | Hayle | August | | Sprint | Relay | | |
| Hebburn Triathlon | Hebburn | August | | Sprint | Relay | | |
| Ireman 226 Challenge | Groomsport | August | | Full | Half | Relay | | |
| Ironman UK | Bolton | August | | Ironman | | |
| Jersey Standard Distance Triathlon | St Aubin | August | | Olympic | Relay | | |
| Leybourne Lake Midweek Series #5 | Leybourne | August | | Sprint | | |
| Leybourne Lake Midweek Series #6 | Leybourne | August | | Sprint | | |
| London Triathlon | London | August | | Olympic | Sprint | | |
| Lough Neagh Triathlon | Ballyronan | August | | Olympic | | |
| North East Childrens Triathlon | Hebburn | August | | Kids | | |
| Nottingham Triathlon | Nottingham | August | | Sprint | | |
| Outlaw Triathlon | Nottingham | August | | Full | Relay | | |
| Portobello Sprint Triathlon | Portobello | August | | Sprint | | |
| Rugby Sprint Triathlon | Rugby | August | | Sprint | | |
| St. Agnes Triathlon | St. Agnes | August | | Sprint | | |
| Swanage Classic Triathlon / Sprint Triathlon | Swanage | August | | Olympic | Sprint | Relay | | |
| Thames Turbo Triathlon Series #4 | Hampton | August | | Sprint | | |
| Wakefield Junior Triathlon | Wakefield | August | | Juniors | | |
| Wick August Sprint Triathlon | Wick | August | | Sprint | Relay | | |
| Worcester Sprint Triathlon | Droitwich | August | | Sprint | | |
| Accelerace Extreme Triathlon | Teignmouth | September | | Half | | |
| Bala Standard Distance Triathlon | Bala | September | | Olympic | | |
| Big Triathlon, The | Fort Williams | September | | Half | Relay | | |
| Brighton Marina Triathlon | Brighton | September | | International | Relay | | |
| Clacton Triathlon Weekend | Holland on Sea | September | | Olympic | Sprint | Relay | | |
| Granite Man | Pembroke | September | | Half | Sprint | Relay | | |
| Haddington Triathlon | Haddington | September | | Sprint | | |
| Helvellyn Triathlon | Glenridding | September | | International | | |
| Ilkley Triathlon | Ilkley | September | | Sprint | Relay | | |
| Jumbled Sprint Triathlon | Weymouth | September | | International | | |
| Leeds Triathlon | Leeds | September | | Olympic | Relay | | |
| New Forest Middle Distance Triathlon | Ellingham | September | | Half | Relay | | |
| Newent Triathlon | Newent | September | | Sprint | Relay | | |
| North West Classic Triathlon | Nantwich | September | | Sprint | | |
| Orkney Middle Distance Triathlon | Kirkwall | September | | Half | | |
| Pendle Triathlon | Barnoldswick | September | | International | | |
| Roade Triathlon | Roade | September | | Sprint | | |
| Saddleworth Triathlon | Uppermill | September | | Sprint | Relay | | |
| South Coast Classic Triathlon | Seaford | September | | Olympic | Sprint | | |
| Tri for Life Triathlon | Windsor | September | | Sprint | Juniors | Relay | | |
| UK Ironman 70.3 | Longleat | September | | Half | | |
| Vitruvian Triathlon | Oakham | September | | Half | | |
| West Wight Triathlon | Freshwater | September | | International | Relay | | |
| Xterra UK | Neath | September | | Xterra | | |
| Xtreme Terrain Triathlon | Camberley | September | | Off-Road | | |
| Rhayader Triathlon | Rhayader | October | | Sprint | | |
| Rugby MissSprint Ladies Triathlon | Rugby | October | | Women | | |