Sundowner Triathlon

U Prevail Events’ Sundowner Triathlon returns to Allerthorpe Lakeland Park, York, on 13 September 2025. The day features multiple distances: Sprint (750m/20km/5km), Olympic (1500m/45km/10km), and 70.3 (1900m/90km/21km), plus relays and aquabikes; a Sprint has been added. The swim is in a sheltered, shallow man-made lake; the cycle is flat country lanes; the run is a flat lakeside trail, with the 70.3 route adding a canal towpath out-and-back.

The event emphasizes a fun, friendly, spectator-friendly atmosphere with marshals, medical and bike-mech support, chip-timed results, finishers’ medals and T-shirts, and on-site facilities. British Triathlon membership or a single-race pass is required; camping is available at extra cost. Visit the organization's website for the most recent information.