Poolmaraton

Poolmaraton, or pool marathon, is a long-distance swimming event held in a swimming pool. Participants try to cover a predefined total distance by swimming consecutive lengths within a fixed time frame. The format is commonly used for endurance testing and fundraising, and it is organized by swim clubs, charities, and recreation centers.

The distance is influenced by the pool length. In a 25-meter pool, a marathon distance equals roughly 1,688 lengths; in a 50-meter pool, about 844 lengths. Some events allow continuous swimming while others permit planned breaks at the pool edge. Officials count lengths, assign lanes, and ensure safety throughout the competition, with lifeguards and medical staff on site.

Participation is open to amateur and competitive swimmers alike. Entry typically requires basic medical clearance and a briefing on pacing, nutrition, and safety. Many pool marathons serve as fundraisers for charities or community programs, with sponsorship and donations supporting the cause.

Origins and scope: pool marathons grew from endurance swimming traditions and charity swims. They are organized by local clubs and national associations in various countries, with a stronger presence in Europe and North America and growing participation elsewhere.

See also: Long-distance swimming, Charity swim, Open water swimming.