In reply to iusedtoclimb:
I love the Cascadia 7s however they're a long gone older model, and I haven't tried the newest makes. I still run the odd easy run in them on soft ground, although having put 700+ miles on them should probably retire them. Best value shoe for me.
I resisted getting Hokas for ages as I thought 'overpriced' 'gimmicky' and wondered how durable (cost effective) they would be. Bought a pair of Clifton 3s and haven't looked back, really enjoy long runs on road and hard packed trail, comfy and light and are holding up well. I rotate amongst 5 or 6 different types of shoe during the year. Really want to try the Challengers for the Highland Fling. That's not particularly 'mountainous' I know...
Some of the newer Inov8 shoes look interesting for rougher ground, XClaw, Terraclaw etc. Ran Jedburgh 3 Peaks in the Terraclaw 250s and didn't have any issues, again that was mostly trail.
Bear in mind, for long mountainous ultras, you will get trashed feet almost regardless of what shoes you have on, preparing the feet with tape/cream etc is probably more key.