UltraSwim 33.3 Switzerland

UltraSwim 33.3 Switzerland takes you to Lake Geneva (Lac Léman) for a rare fresh-water UltraSwim challenge with Alpine views, UNESCO-listed vineyard slopes, and iconic lakeside towns like Lausanne, Montreux, Chillon, and Evian (France). The headline challenge is the English Channel-equivalent 33.3 km, but it’s not one nonstop swim — the total distance is split across several days and multiple swims (exact legs depend on conditions). Expect a mid-summer lake feel with typical water temps around 22–25°C, plus early starts, long daylight, and variable lake weather (from glassy calm to wind and storms).

- Formats and distances

• 33.3 “Classic”

Total: 33.3 km
Structure: spread over 4 days with multiple swims (usually 5–7 segments)
Signature moment (weather permitting): the Lausanne → Evian country-to-country crossing (around 13 km)

• 33.3/2 “BUILD”

Total: roughly half distance (about 17–18 km, depending on the final plan)
Structure: the same event vibe, but shorter daily swims designed as a progression toward the full 33.3

- What makes Switzerland special

• Only freshwater venue in the UltraSwim 33.3 series
• Public-transport friendly logistics: Swiss trains + classic CGN lake ferries are part of the flow
• Olympic Lausanne atmosphere (the Olympic Museum is right by the venue)
• Purpose-driven: the event supports Léman hope — CHF 50 from each entry is donated automatically, with additional fundraising during the weekend