Here's the map of the area the routes pass through. They are cumulative - the 40-mile route uses the 20-mile as its first half, the 60-mile route uses the 20 and 40. All routes come back through the 20-mile route into Whitchurch, passing under the A34.
If you use Google Earth, you can download/open this file to see all three routes in 3D plus the marshal points and Cake stops.
Website Design - Steve Berry - wysiwyggraphic - 2017 - www.wysiwyggraphic.com