Switzerland's large lakes — Geneva, Lucerne, Zurich, Thun and others — are served by historic steamer and modern boat fleets. Most companies allow dogs on board on the same general terms as SBB trains: free under 30cm in a carrier, a ticket required for larger dogs — SBB's own Dog Pass page confirms coverage extends to lake boats, not just rail. Lake boats themselves are run by separate regional companies (CGN on Lake Geneva, SGV on Lake Lucerne, and others), not SBB, so always confirm any onboard or restaurant-specific rule with that operator directly rather than assuming it's identical everywhere.

Does the Day Pass Dog cover lake boats?

The Day Pass Dog (CHF 25) and the monthly and yearly Dog Passes cover most lake boat operators alongside trains and postbuses, so it's rarely worth buying a separate boat-only ticket if you already have one of those.

Where on the boat are dogs not allowed?

The one consistent restriction is the onboard restaurant section: dogs are usually welcome on the open deck and general seating areas, but not welcomed into the dining section, particularly on boats running dedicated culinary cruises.