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Get the appUnited Kingdom has 148 upcoming Triathlon events across distances like 0K, 1K, 2K, 3K, 4K, 5K, 6K, 9K, 10K, 12K, 13K, 15K, 18K, 20K, 21K, 22K, 24K, 25K, 26K, 27K, 28K, 29K, 31K, 32K, 36K, 39K, 40K, 42K, 43K, 50K, 53K, 56K, 57K, 66K, 69K, 80K, 96K, 100K, 103K, 108K, 113K, 3541K, 4220K. Recent additions include Derwent Reservoir Triathlons 2026, IRONMAN 70.3 Swansea, Holly Hill Triathlon.
148 events
12
Derwent Reservoir Triathlons 2026
Sun, Jul 12, 2026Consett, United Kingdom
12
IRONMAN 70.3 Swansea
Sun, Jul 12, 2026Swansea, United Kingdom
12
Holly Hill Triathlon
Sun, Jul 12, 2026Southampton, United Kingdom
12
ATW Bristol Triathlon
Sun, Jul 12, 2026Bristol, United Kingdom
12
Tavistock Triathlon
Sun, Jul 12, 2026Tavistock, United Kingdom
12
Cotswold Classic V2.0 Middle Distance Triathlon
Sun, Jul 12, 2026Cirencester Abbey, United Kingdom
12
Woodford Community Duathlon
Sun, Jul 12, 2026Stockport, United Kingdom
12
Manchester Triathlon Club Boundary Breeze Sprint Triathlon and Aquabike
Sun, Jul 12, 2026Crewe, United Kingdom
12
Archipelago Swimrun
Sun, Jul 12, 2026Isles of Scilly, United Kingdom
12
Northern Traverse Swimrun
Sun, Jul 12, 2026Tresco, United Kingdom
12
The One on the River - Marlow
Sun, Jul 12, 2026Marlow, United Kingdom
18
Clevedon SwimRun
Sat, Jul 18, 2026Clevedon, United Kingdom
19
On The Edge Middle Distance Triathlon
Sun, Jul 19, 2026Warwick, United Kingdom
19
Compton Verney Sprint Triathlon
Sun, Jul 19, 2026Warwick, United Kingdom
19
Bedford Triathlon Team Relays
Sun, Jul 19, 2026Bedford, United Kingdom
19
The Felixstowe Triathlon 2026
Sun, Jul 19, 2026Felixstowe, United Kingdom
19
Marlow Triathlon July 2026
Sun, Jul 19, 2026Marlow, United Kingdom
19
Osborne's Grays Triathlon (Aquabike / Aquathlon)
Sun, Jul 19, 2026Grays, United Kingdom
19
Clevedon Triathlon
Sun, Jul 19, 2026Clevedon, United Kingdom
25
Outlaw Original Weekend 2026
Sat, Jul 25, 2026Nottingham, United Kingdom
25
XTERRA Lake Scanno
Sat, Jul 25, 2026Barnstaple, United Kingdom
25
London T100 Triathlon
Sat, Jul 25, 2026London, United Kingdom
26
Dorney Lake Triathlon 26th July 2026
Sun, Jul 26, 2026Windsor, United Kingdom
26
RunThrough Guildford Sprint Triathlon and Kids Aquathlon July 2026
Sun, Jul 26, 2026Guildford, United Kingdom
26
The One on the River - Henley - July
Sun, Jul 26, 2026Henley-on-Thames, United Kingdom
26
Dorney Lake Triathlon Sprint & Standard
Sun, Jul 26, 2026Windsor, United Kingdom
26
Gosfield Triathlon & Multisport 2026
Sun, Jul 26, 2026Halstead, United Kingdom
26
Snowman Triathlon, Duathlon & Swims 2026
Sun, Jul 26, 2026Rhyl, United Kingdom
1
ATW Mallory Park Triathlon
Sat, Aug 1, 2026Leicester, United Kingdom
1
GV 70.tri 2026
Sat, Aug 1, 2026Port Talbot, United Kingdom