Well my Mudclaw 330's http://www.inov-8.com/Products-Detai...6&P=5050973112 have been very comfortable since I started wearing them (April-ish I think) but they've very nearly had it now. In fact they're pretty much fcuked - the grips are shot and the tops are tearing in places. I have worn them over all terrains though, often in the same run and have even done a 13 mile road half marathon in them

I think running in the Lakes is more felly, with far more open fell (grass and bog) running than the Dales and the soles take less of a wearing down. Conversely the uppers are probably more prone to being rotted down by the mud and wet. In the Dales my running routes (and the race routes I have trogged round too) seem to more often follow paths/trails and these (like the Penine Way in places) are often rocky and rubblely rather than muddy. The Dales ruins the soles then but preserve the uppers

So with me running in The Lakes, Dales and even roads, I can't in all honesty believe they've lasted as long as they have.