Are we talking general distribution beers or brewed specifically for a ski area by a brewery beers?
If it’s specific for a ski area, Mount Snow has had specific by Northshire, Harpoon and Foolproof the last few seasons, with Northshire brewing Mount Snow Ale, Harpoon has done Beartrap Brown and also a particularly good barrel aged version of Beartrap Brown as well as Sap Tapper, and then Foolproof has made Yahdsale (hat tip to the RI brewery and the bump run at Mount Snow) as well
And a generic one is Rogue’s Yellow Snow Ale B)