Hello Alan
Not sure how far you are travelling from, but my advice has to be that if you like dramatic scenery, Scotland has a great deal to offer. Within easy reach of Glasgow, consider the
Arran Coastal Way – only an hour on the ferry from Ardrossan: in four days you could do all the good parts using the bus to skip the road walking from Lochranza to Blackwaterfoot. Or how about the
Cowal Way? It needs 5 days to complete, but again you could skip the road-walking and shorten it. Or if you are willing to do a really long first day, you could go for the
Great Glen Way from Fort William, and overnight in South Laggan (23 miles) Invermoriston (18 miles) Drumnadrochit (14 miles) and Inverness (18 miles). But that means pushing hard and having little time to linger and enjoy: is that what you want?
The only Scottish route I have comfortably completed in four walking days is the
Cateran Trail, especially if you just do the loop and miss out Blairgowrie. Even the St Cuthbert's Way (Melrose to Holy Island) is 62 miles and splits more readily into 5 days than 4. But I haven't actually walked it, so can't really comment. Can anybody advise, or suggest alternatives?