Top 30 Triathlons in United Kingdom
This curated ranking covers the 30 largest triathlons in United Kingdom, ordered by estimated audience size from Rascasse's anonymized search-behavior signals. Ironman 70.3, London Triathlon and Mark Allen (triathlete) lead the list with a combined estimated audience of 917,311 people. Across all 30 entries the average audience size is 45,157, and the largest, Ironman 70.3, reaches around 542,563 people in United Kingdom. Audience size is the estimated number of unique people in United Kingdom who actively engage with each triathlon, derived from search demand signals. Rankings reflect search-behavior signals collected across United Kingdom and are refreshed weekly.
Ranking
| Rank | Name | Audience size | Country share | Subtype | Category |
|---|---|---|---|---|---|
| 1 |  Ironman 70.3 |
542,563 | 9.0% | Triathlon | Sports |
| 2 |  London Triathlon |
194,385 | 89.9% | Triathlon | Sports |
| 3 |  Mark Allen (triathlete) |
180,363 | 38.1% | Triathlon | Sports |
| 4 |  Craig (CROWIE) Alexander |
94,591 | 7.2% | Triathlon | Sports |
| 5 |  Alistair Brownlee |
66,617 | 63.0% | Triathlon | Sports |
| 6 |  World Triathlon |
60,931 | 10.4% | Triathlon | Sports |
| 7 |  Escape from Alcatraz (triathlon) |
42,420 | 5.1% | Triathlon | Sports |
| 8 |  Challenge Roth |
26,724 | 5.6% | Triathlon | Sports |
| 9 |  USA Triathlon |
26,158 | 6.1% | Triathlon | Sports |
| 10 |  Ironman Heavymetalweight Championship |
20,185 | 2.7% | Triathlon | Sports |
| 11 |  Ironman World Championship |
18,333 | 2.1% | Triathlon | Sports |
| 12 |  Ironman Triathlon |
11,864 | 0.4% | Triathlon | Sports |
| 13 |  Jan Frodeno |
10,253 | 4.5% | Triathlon | Sports |
| 14 |  Chris McCormack (triathlete) |
8,903 | 16.1% | Triathlon | Sports |
| 15 |  British Triathlon Federation |
8,744 | 39.4% | Triathlon | Sports |
| 16 |  Supertri |
7,845 | 18.1% | Triathlon | Sports |
| 17 |  Dave Scott (triathlete) |
7,621 | 5.3% | Triathlon | Sports |
| 18 |  IRONMAN Austria |
7,554 | 7.4% | Triathlon | Sports |
| 19 | International Triathlon Union |
4,955 | 4.1% | Triathlon | Sports |
| 20 |  Timothy O'Donnell (triathlete) |
3,984 | 9.1% | Triathlon | Sports |
| 21 |  XTERRA Triathlon |
3,031 | 0.5% | Triathlon | Sports |
| 22 |  220 Triathlon Magazine |
1,964 | 8.9% | Triathlon | Sports |
| 23 |  ITU Long Distance Triathlon World Championships |
1,689 | 11.0% | Triathlon | Sports |
| 24 |  Ironman Germany |
1,587 | 0.8% | Triathlon | Sports |
| 25 |  Sebastian Kienle |
697 | 1.6% | Triathlon | Sports |
| 26 |  Mirinda Carfrae |
342 | 6.0% | Triathlon | Sports |
| 27 |  Triathlon at the Summer Olympics |
212 | 6.3% | Triathlon | Sports |
| 28 |  Andreas Raelert |
119 | 1.8% | Triathlon | Sports |
| 29 |  Pete Jacobs (triathlete) |
41 | 0.6% | Triathlon | Sports |
| 30 |  Sarah Haskins (triathlete) |
35 | 0.1% | Triathlon | Sports |
Frequently asked questions
How is this Top 30 list compiled?
Rascasse aggregates anonymized search-behavior signals across United Kingdom and ranks each triathlon by its estimated audience size. Only entries with at least 5 measured entities are listed.
How often is the list updated?
The ranking is refreshed weekly from the latest search-behavior data and re-published as a static page.
What is the largest triathlon in United Kingdom?
Ironman 70.3 currently leads with an estimated audience of 542,563 people in United Kingdom.
Methodology
Audience sizes are estimated from anonymized search-behavior signals across United Kingdom. Lists below 5 entries are not published. See methodology for full details.