It all happened one Sunday afternoon as I was catching up on my ski news, when something caught my eye. A little article called "Mount Tremblant Canada Unveils Summer Skiing Terrain Park". While this isn't as good as Big Snow, it is an alternative, which is closer (at least to me). The park contains four features, tube, up flat box, box, fun box, and is serviced by a magic carpet.
I couldn't find stats online (vertical, acreage etc.), it looked reasonably sized. If someone has been there please report back, because I'm hoping to make the trip up there at least once this summer.
Pictures are in this article along with more info:
https://www.powder.com/news/tremblant-canada-summer-skiing-park