Seeing the snow fall with your own eyes is always better than any ski report! Don't just get the numbers, check the actual live feeds from Big Sky Resort's webcams.
Starting Monday, May 11th, you'll encounter some single lane closures on HWY 191 between Big Sky and West Yellowstone as part of the "North of West Yellowstone project".
All of these Montana closing dates are subject to change at each ski resort's discretion, depending on end of season snow conditions and other factors. Several Montana areas have flexibility in their closing dates.