If the weather is okay I would like to propose you a wee circuit :
If started from Glasgow, it's 200km, and from Stirling Train Station 150km!
Start and Finish from McLennan Arch
The route as follow (cf link)
Meeting #1 at 8h30 - leaving at 8h35
Meeting point #2 (~9h) at Torrance Roundabout
Meeting point #3 (~10h20) at the Bridge Clock Tower, Stirling
Cafe Stop (~11h45) at the Tullybannocher Cafe