Half Madrid Triatlón

Half Madrid Triatlón is a middle-distance triathlon staged around the lake in Madrid’s Casa de Campo. The most recent edition took place on Sunday 27 September 2026, with the swim, bike and run based at the Lago de la Casa de Campo. The organiser’s site describes it as the Madrid middle-distance championship, counting towards national rankings.

Routes and distances

• Half: 1,850 m swim, 83 km bike, 18.6 km run
• Short: 950 m swim, 40 km bike, 10 km run
• Aquabike: 1,850 m swim, 83 km bike, 280 m run

These are the figures published for the 2026 edition; check the organiser’s course pages for any changes.

Registration

Entries go through the organiser’s online registration page, and participation across all three formats is capped at 800 places. Prices for the next edition are not yet listed. The organiser’s site indicates that registration for its next edition opens on 5 November at 17:00, but it shows conflicting dates for the race itself, so the date of the next edition has not been confirmed yet. Details are on the official website.

Why race it

The swim takes place in the Casa de Campo lake, with the bike and run staged within Madrid itself, so the whole event is easy to reach by public transport. The Short and Aquabike options give newcomers and cyclists a way in without committing to the full Half distance.

Where to stay

Madrid offers plenty of hotels within easy reach of the Casa de Campo, which makes arriving the day before and collecting your bib straightforward. Browse cycling-friendly accommodation and book early for race weekend.