I'm planning to take my son skiing on his spring break. The dates would be April 4-11. Originally I wanted to go to Whitefish because we have some friends that moved to Kalispell but it appears that their traditional closing date would be April 4th. I know Jackson Hole closes the first full weekend of April so that's out and my favorite ski area to visit, Powder Mountain, will likely be closed by then as well. So what other ski resorts are traditionally closed at that time of year?