When we lived up by the lake, we could see the kagool and trainer brigade heading up to Llyn Crafnant, not a mountain, but above the snow line, they found out the hard way, that they should have checked the weather forecast before setting off, and as above should have been better prepared, the worst case we experienced...... two children separated from a larger group, fortunately they found our house and we were in, it took awhile to warm them up, very lucky indeed.