Arapahoe Basin in Colorado will be open until June 7th, it currently has a 140cm (55 inch) base after receiving three inches (8cm) of new snow in the past week.
Mammoth Mountain in California has sunny conditions and has announced it intendfs to stay open until at least June 14th, "maybe longer." Current base is up to 10.5 feet (315cm)
In Utah, Snowbird's long season continues, with skiing on Fridays, Saturdays and Sundays until May 25th, conditions permitting. Season snowfall to date has passed 15.5 metres, (621 inches) with 3.2 metres (128 inches) currently at mid-mountain.
Timberline in Oregon is reporting the most snowfall of the past week with 20xcm (Eight inches) of new snow topping up it's base depth of over five metres (17 feet), it's looking good for skiing through to the annual two week shut down in September.
Also in Oregon, Mt Bachelor has entered its last week of the season with an inch (2.5cm) of fresh snow reported in the past 24 hours. The resort closes on the 17th and currently has a base depth of 3.5 metres (140 inches) at mid-mountain