Braemar to Inverness long distance hike - Day 4

An epic 113 mile cross country walk from Braemar to Inverness. 6 days walking, 5 days camping.
I plotted a route out on Google Earth which included some of my favourite places to visit in the Cairngorms.

 On day 4, I walk approximately 22 miles from River Spey near Laggan all the way to Fort Augustus on the Corrieyairack Pass. I visit two bothies en-route and find a time-machine. I camp at Cumberlands Campsite, Fort Augustus where I enjoy a Friday night Pint.