Was over there today and got chatting to one of the rangers (who's also a keen mtn biker). As per OP, the 'bike park' is the worst hit area, but also stretches of the red route around that area are also shut. I did my usual off-piste stuff around there and there are a LOT of fallen trees about down there - it's the worst mini tornado strike I've ever seen in there. (myself and a pal were sessioning the bike park runs about an hour before it hit )
The ranger reckons at least 200 of the larger trees have come down. He said the problem is that the forestry machines they're having to use to get the trees cleared are wrecking the trails. He said that they (...including him!) are going to repair and if necessary rebuild the trails, but said realistically, it's gonna probably be at least 2 to 3 weeks before it's tidied up. Of all the trails in Pines that a tornado could've hit!