Complex sentence: High Street can also be climbed from Patterdale, Kentmere and Troutbeck: these are less interesting routes, although the walk from Troutbeck does follow the line of the Roman road.
Split into simpler sentences: High Street can also be climbed from Patterdale, Kentmere and Troutbeck. Other routes include a walk from Troutbeck-which follows the line of the Roman road.