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Ultra Bielersee 50 km is a scenic 50.5 km ultra-marathon circumnavigating Lake Biel with a notable excursion to St. Petersinsel; the organiser describes it as an "Ultra‑Marathon rund um den Bielersee". The course follows a mostly flat profile on a mix of bike and walking paths and natural trail sections, offering wide lake views and village passages through locations such as Erlach, Ligerz and La Neuveville. The race starts and finishes at Lago Lodge Biel (Uferweg 5, Nidau) and is marked throughout with distance signage and a mapped route available from the organiser.
The event provides eight staffed aid stations along the route and allows runners to drop personal provisions at four designated posts, with posted drop‑off times. There is an 8‑hour time limit (Zielschluss 17:00) and official timing and results are provided, with prizes for category winners and top overall finishers. Logistics are straightforward: parking is available near Lago Lodge (fees apply) and the start is approximately a seven‑minute walk from Biel SBB railway station, and the entry fee for the listed 2026 edition is CHF 60.
Lago Lodge Biel, Uferweg 5, 2560 Nidau bei Biel, Switzerland