Arapahoe Basin is still open. However, the north side or the double chair called Pallavicini or "Pali" will closed Tuesday, May 20th. While there is no official closing date, the original closing date was to be June 1st.
There is plenty of snow up at A-Basin and they could definitely extend. The best place to go to get the beta is Chief Operating Officer, Alan Henceroth's blog or Al's blog. They have had over 430 inches of snow at A-Basin.
Stay tuned for more updates for the 2013-2014 endless winter at A-Basin!