How far in advance should I book for May or June Lütschine rafting?

For May and June departures, booking at least two to three weeks in advance is recommended, particularly for the 08:15 and 10:15 departure slots, which fill first. Early summer has become increasingly popular as word about high-water conditions has spread. Online booking is available directly on the OUTDOOR website with immediate confirmation. For groups of 10 or more or charter bookings, booking earlier (4-6 weeks ahead) is recommended.