What to know in advance
The final kilometres are a mountain serpentine with weather restrictions. In winter and after rain only all-wheel-drive vehicles are allowed; on some days the climb is closed entirely. The dispatcher checks conditions on the morning of departure and, if a restriction applies, offers to move the trip.
The area above the lake is a border zone: a permit may be required to continue to the observatory and the pass. If one is needed we flag it at booking — processing takes several days.