21 Most Popular Triathlons in Ireland 2026 — by Audience Size

How to read this list

Rank

Position in the Top 21, sorted by audience size from largest to smallest. Updated weekly.

Audience size

Estimated number of unique people in Ireland who actively engage with this audience, derived from anonymized search-behavior signals.

Country share

Share of the global audience that is active in Ireland. A higher value means the audience is more locally concentrated here.

Avg age

Average age in years across the people who engage with this audience in Ireland, derived from anonymized search-behavior signals. A dash means demographic data is not yet available.

Female share

Share of women among the people who engage with this audience in Ireland. 50% is gender-balanced; values above mean female-skewed, below mean male-skewed.

Ranking

Rank	Audience	Audience size	Country share	Avg age	Female share	Subtype
1	IIronman 70.3	55k	0.8%	42.2	68.6%	Triathlon
2	EEscape from Alcatraz (triathlon)	21k	2.5%	42.3	47.0%	Triathlon
3	MMark Allen (triathlete)	19k	3.0%	33.3	47.8%	Triathlon
4	WWorld Triathlon	7.3k	1.3%	34.5	100.0%	Triathlon
5	CCraig (CROWIE) Alexander	7k	0.6%	42.6	43.7%	Triathlon
6	UUSA Triathlon	3.6k	0.8%	45.3	40.7%	Triathlon
7	IIronman World Championship	2.1k	0.0%	41.3	63.0%	Triathlon
8	IIronman Heavymetalweight Championship	1.8k	0.2%	45.7	60.0%	Triathlon
9	AAlistair Brownlee	1.7k	1.7%	48.1	39.3%	Triathlon
10	CChallenge Roth	1.2k	0.2%	37.1	40.8%	Triathlon
11	IIronman Triathlon	1.2k	0.1%	39.0	46.7%	Triathlon
12	LLondon Triathlon	684	0.3%	47.0	13.5%	Triathlon
13	BBritish Triathlon Federation	652	2.9%	47.9	31.5%	Triathlon
14	JJan Frodeno	646	0.3%	33.1	44.9%	Triathlon
15	XXTERRA Triathlon	542	0.3%	41.3	17.6%	Triathlon
16	IInternational Triathlon Union	456	0.4%	39.3	36.6%	Triathlon
17	SSupertri	218	0.5%	40.6	57.7%	Triathlon
18	IIronman Germany	199	0.1%	42.7	35.0%	Triathlon
19	DDave Scott (triathlete)	198	0.2%	33.0	44.6%	Triathlon
20	AAndreas Raelert	33	0.5%	37.6	0.0%	Triathlon
21	IITU Long Distance Triathlon World Championships	17	0.1%	25.3	22.9%	Triathlon

Want the full picture for any of these audiences?

Open any profile to see psychographics, top regions, peer affinities and demographic splits — all derived from the same anonymized signals.

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Frequently asked questions

How is this list of the most popular triathlons compiled?

Rascasse aggregates anonymized search-behavior signals across Ireland 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 Ireland?

Ironman 70.3 currently leads with an estimated audience of 55k people in Ireland.

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