In reply to Ben_Climber:
A Cairngorm circuit, there are a couple of variations and can be done clockwise or anti-clockwise, but basically it's Lairig Ghru and Lairig an Laoigh.
For a 3 day walk you've got Corrour bothy and Fords of Avon refuge as your stops, or if you wanted to do it over 2 longer days then Bob Scott's is about halfway.
Can choose whether to go through Chalamain Gap, or a slightly longer version that includes going around Loch Morlich is up from ( or down to ) Piccadily. The longer circuit is 34 miles, guessing the shorter one is about 30 ??
The river crossing at Fords of Avon can be tricky if rivers are high, so be aware.
Think there's an article somewhere on UKC/UKH where one of the writers wrote up this walk - seem to recall they did a couple of Munros as well ( Carn a'Mhaim I think was one )
Post edited at 15:58