by Cairngormwanderer » Thu Feb 07, 2013 10:17 pm
Several routes from that side. If you go up into Coire nam Beith (a lovely coire) you can either head up to the right of Stob Coire nam Beith and then traverse the main ridge to reach Bidean, or you can turn left and go up to the col between Bidean and Stob Coire nan Lochan. There are other routes, but I think those are probably the most straightforward, the second better taken in ascent than descent. However both are steep in parts and you would do well to be aware of the state of the snow for avalanches.
Given decent conditions (and the Lost Valley approach is steep near the crest too) I reckon it's a far superior day to the usual trudge up to the head of the lost valley.