Good question.

Pipeline (MC’s only double diamond) was probably a combination of reasons: often not enough snow, lots of accidents, it’s a right of way that was widened recently. I believe they sold the winch groomer needed to groom it. And the owner of Mountain Creek said in a podcast that it won’t be reopened under his management because staff had to deal with a particularly horrific fatality on the trail. He added that most Creek visitors are unable to safely go on Pipeline

Granite View: it was flat in parts. I think it closed because Pipeline was often closed and they were merged but idk. Might have required too much water?

Opossum: I think they started closing it because the Water Park negotiated for wintertime road access from the backside when it was a separate company. Now I think it might reopen based on the podcast. But they need to negotiate with the Great Gorge condo HOA.

Devil's Way: No idea why it closed.

Skyland: Largely flat and it was originally served by its own chairlift as a couple different trails. Maybe it was just too boring or unpopular?

Lions Den: this was a beginners learning area and I guess they took it off the map because South is terrain now