This route in Glacier National Park can be done either direction but I think the views becoming increasingly more dramatic starting from the Bowman side. 

Devised by outdoors writer and broadcaster Cameron McNeish, the Scottish National Trail is a challenging, 864 kilometre-long unofficial long distance walking route running the length of Scotland from Kirk Yetholm in the south to Cape Wrath in the north. The route is sure to make an impression on visitors with the sheer variety of scenery - from the historic capital of Edinburgh to remote Highland villages, and from the heights of the Cairngorm Mountains to the depths of Loch Ness.