Quick update re my Spirit Lites; went out today up Firth Fell and Buckden pike, as I can see them from my usual haunts above Silsden and they didn't look too snowy - well, they were! Once above the treeline the snow made the tracks invisible and the route just about walkable but definitely not runnable for the most part. So I ended up doing 13 miles, 3000ft and I must say I was still pleased with the Spirit Lites, which coped pretty well with both up and downhill deep snow. I have a bit of a hotspot on one heel now, but I think that is a hangover from my last run and not the fault of the washies. So, I'm looking forward to wearing them for all my longer distance jaunts now, confident that the grip will keep me upright and the lowish sole unit will keep my feet nicely in touch with the terrain underfoot.