Plattekill does this although I'm not sure they publicize it.
If you want to ski late at Plattekill in spring, look for Laszlo late in the day. Rip it with him, and make sure to tell him Plattekill has the best terrain in the Cats. He'll skis until the sun goes behind the mountain and will keep the lift running until then.
Laz loves the corn
"You just need to go at that shit wide open, hang on, and own it." —Camp