🇨🇭 Ultra Running · Nidau/Biel, Switzerland · 13–16 May 2026

Bielersee
Ultra Marathon 2026

SPORTS INFOS — Loop around Lake Biel with an excursion to St. Petersinsel, between the Jura and the Alps. 13–16 May 2026. Ultra 50.5K · XXL 120/160/200K · 72h · Half 21.1K · Walking 40K · Relay. Start/Finish: Lago Lodge Nidau.

🇨🇭 13–16 May — Biel/Bienne, CH 🏝️ St. Petersinsel loop 🏔️ Jura & Alps views
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Results — Bielersee Ultra Marathon 2026

Official live results on raceresult — Ultra 50K, XXL 120/160/200K, 72h, Half 21.1K, Walking 40K, Relay — 13–16 May 2026, Lago Lodge, Uferweg 5, 2560 Nidau bei Biel, Switzerland.

Results raceresult → 🌐 ultrabielersee.ch →

Lake Biel Loop — Switzerland's Most Scenic Ultra

The Bielersee Ultra Marathon circles the entirety of Lake Biel (Lac de Bienne) on mostly flat bike and walking paths, with a scenic detour onto St. Petersinsel — the island where Rousseau famously took refuge. The main event, the Ultra Bielersee 50.5K, starts Saturday 16 May at 9:00 AM from Lago Lodge Nidau and closes at 17:00 (8h limit). Course record: Raphael Josef 3:04:45 (2021, unofficial Swiss record). The race also features jaw-dropping multi-day formats: the XXL (120/160/200K, multiple lake loops) and the 72h challenge (how many laps can you complete in three days?). Start: 7 minutes' walk from Biel SBB station.

50.5KUltra — main race
200KXXL max
72hMulti-day race
8h50K time limit

"No traffic, no hills — just the glittering waters of Lake Biel, the silhouette of the Jura above, the Alps shining to the south, and a tiny island detour that would have made Rousseau proud."

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Ultra 50.5K course — Lake Biel loop : Lago Lodge Nidau → Sutz/Lattrigen → Hagneckkanal → Lüscherz → Vinelz → Erlach → St. Petersinsel → Erlach → St. Johannsen → Le Landeron → La Neuveville → Ligerz → Twann → Tüscherz → Lago Lodge Nidau. Mostly flat — bike & walking paths + some asphalt. 8 aid stations (own food can be dropped at 4 of them).
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Start & Finish: Lago Lodge, Uferweg 5, 2560 Nidau bei Biel (BE), Switzerland. Parking at Lago Lodge (fee applies). 7 min walk from Biel SBB station. Mid-May: 12–18°C, possible rain. Garderobes and showers on-site. Entry fee: CHF 60. Free start for runners with marathon PB under 2h30.
Road Running Shoes & Gear — i-Run
Ultra-marathon shoes for flat Swiss lakeside paths — Bielersee 50K to 200K: i-Run, running specialist.
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Race Programme — 13–16 May 2026

Event Distance / Start Details
Bielersee 72h 72h — Wed 13 May, 12:00 Wed 13 May 12:00 → Sat 16 May 12:00 · How many loops can you do?
Bielersee XXL XXL 120/160/200K — Fri 15 May, 12:00 Multiple lake loops · Starts Friday noon ahead of the main race
Ultra Bielersee 50K 50.5K — Sat 16 May, 09:00 Full lake loop + St. Petersinsel · 8h limit · 8 aid stations · Record: 3:04:45
Hagneck-Halbmarathon HALF 21.1K — Sat 16 May, 09:00 Half-lake loop → Hagneckkanal turnaround · Lago Lodge start
Bielersee Walking 40K 40K — Sat 16 May, 09:00 Walking distance · Same 8h limit as the 50K
Bielersee Staffette (Relay) 50K relay — Sat 16 May, 09:00 Team relay covering the full 50K lake loop

🏔️ Bielersee Ultra Marathon 2026 — Official Results

Ultra 50.5K · XXL 120/160/200K · 72h · Half 21.1K · Walking 40K · Relay — 13–16 May 2026, Lago Lodge, Nidau/Biel, Switzerland. Loop around Lake Biel — St. Petersinsel.

Results raceresult → 🌐 ultrabielersee.ch →

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