This should be a very useful resource. “Joined up” path network.
Map of Scotland’s core paths
Scottish Natural Heritage has combined the core path plans that have been drawn up by all of Scotland’s local authorities and National Park authorities to produce an online map. The main local routes for recreation and travel, known as core paths, are usually signposted. Not all are on land, and they include some rivers or canals that are used for canoeing. View the map and find out more