From Knocken Crag, walked round the back of Cul Mor to come up quite steeply on crusty snow to the top. Fantastic views all day and an amazing long walk. Down quite steeply to the small Loch and round the side of it to come up the North side of Cul Beag. Lots of disappearing contour lines on the OS map and looked steep - but was a good easy path all the way up. Amazing sun set on the descent and back to Knocken Crag.