The Heideseetriathlon Forst is a sprint-distance triathlon and relay race held at Heidesee in the Oldenburger Münsterland, organized by TuS Blau-Weiß Lohne. It accommodates all age groups, with distinct categories for individual participants and relay teams. The event follows a structured club race format, including accreditation, bike check-in, and a race briefing at the swim start.
The sprint race features a rolling start, whereas relay teams begin together. The competition requires proficiency in the standard short-course disciplines: a clean swim, a composed transition to the bike, and sufficient energy reserves for the run. Youth participants are included, with specific attention to bike rollout regulations under the sport's rules. A portion of the entry fee supports "Sportler gegen Hunger" (Athletes Against Hunger), a campaign backed by the Oldenburgische Volkszeitung.