Not the one you are thinking about. It's the other one. The one in Oregon, and the lifts are turning.

Also 

Araphoe Basin is getting ready for June skiing, while Vail Resorts has given up on any attempt to do so..

https://freeskier.com/stories/my-first-day-on-a-chairlift-after-the-world-shut-down

Mt. Bachelor opened on May 16 and has a few more days.  This weekend will be the final days.  Only running a couple lifts, which is typical this late in the season.  Only allowing season passholders to make a reservation the day before, with a cap of 500.