Iain will know a lot more about the route choices than me - my comment on Cwm Glas Bach being quicker than Lechogg was based on one recce and what I've read. The reason we used it was partly because it was convenient for a breakfast stop at the Snowdon bunkhouse at Gwastadnant where we stayed. If we hadn't stayed there it might have been preferable to go via Lechogg and avoid the road. That's a few years ago when I walked it and I'd like to have a go running now, starting on Snowdon (possibly when I'm staying nearby from 5-29th August). There is one bit I'm not that keen on in this direction and that's the descent down the last Crib Goch pinnacle (well, first in this direction) - I've only done it once in this direction and it seemed very exposed going down (much more so than in the normal way in ascent). I assume there must be a way of avoiding this on the south (less exposed) side?