Having done the three eastern Munros a few weeks ago from the Lochan Fada side, my plan was to walk in from the north and do the other western two all in one day to avoid a wild camp. Two things that I would point out - first, the distance measured on Basecamp was 11 miles each way, but in the end what with the detour to get back across the river and the inaccuracy of the program, my final walked distance was 26 miles. So my estimate of 14 hours turned into 17 hours. My average in the hills is 1.5 mph, so you can adjust that to suit yourself. Secondly, a point which Walkhighlands makes, but perhaps doesn't emphasise enough, is that the rivers fill up very quickly after rain. We had decent crossings in the morning, but solid rain all afternoon and getting back over to Shenevall in the evening was the most scared I've ever been in the hills. We walked round to the loch to try to get them in one crossing, but the river was moving slowly - probably more than 10 feet deep, so we crossed at 055 812 which was up to our chests. Have a plan B ready - either camp another night in Glen Muice, or have a friend with a helicopter on speed dial.
The walk back up and over on Allt a Chlaiginn was a slog after such a long day. So, if you need to do these two, this is an option, but give yourself plenty of time.
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Warning Please note that hillwalking when there is snow lying requires an ice-axe, crampons and the knowledge, experience and skill to use them correctly. Summer routes may not be viable or appropriate in winter. See winter information on our skills and safety pages for more information.