Oslo Triathlon, Norway

, July 17, 2025

The Oslo Triathlon typically takes place in August, harnessing the idyllic location of Lake Sognsvann, a popular recreational area easily accessible from Oslo city centre.

The terrain offers a varied challenge, starting in the calm waters of Lake Sognsvann before taking on the hillier surrounds. The bike course ventures through Maridalen, featuring some rolling hills and scenic routes, while the run is a relatively flat loop around Lake Sognsvann – flat trail track.

Lake Sognsvann on a quiet day

The event offers several race distances including Olympic distance (1500m swim, 40km bike, 10km run) and Sprint distance (750m swim, 23km bike, 5km run). There are also Super Sprint and Relay options, making it accessible for both seasoned triathletes and beginners.

Visit oslotri.com for race entry