Our group went all across and around the Olkhon Island, and we even got to do some ice skating on a smooth part of the lake.
In these months the ice is thick enough for cars to drive on, so that's the main mode of transport. The drivers can be pretty crazy there, our guide told us some of them go upwards of 100 km/h on ice lol, that sounds very dangerous.
But we also traveled on airboats a few times -- also a fairly unique experience.
2/2
