Yeah some places may if are open for too long.
But closing in the first week of April? During a powder day?
that's walking the line between crazy and practical.
yeah sick for all you with snowbird passses, sleds or skins. snow all you want, but don't rain in the valley or in park city. its biking season damn it!
Resorts set closing dates and advertise for those dates. If a resort was to stay open longer because of good snow pack there would not be many tourists that would come because of the short notice of extending the season.
A lot of resorts are located on National Forest and lease the land from the gov't. It is possible for them to get an extension but it does not happen very often.