I have a cabin in Alpine and I've never been snowmobiling up there or atleast Greys. My family had some old trail machines and I mean old. and We bought new mountain sleds 3 years ago (upgrading this year) and I haven't been up there in the winter since. I was up there two weeks ago and rode the bikes up Greys but man how far do you have to go before it opens up for good sledding? I always hear that Greys canyon is good but wow it would be a long trail ride. Please help with how far and where to go up Greys. Maybe this winter someone could show me around??