Pop down to Muiravonside Park via River Avon Heritage Trail (trail starts just under railway viaduct at Linlithgow Bridge). You can head along to Callendar Estate trails via either canal or PROW from Maddiston to California (although the PROW runs better west to east since it is gradually downhill – if you’re looping I’d go canal to Falkirk them back to Linlithgow via the PROW).
Have a wee look here, some ideas for Muiravonside Park, old brickworks next to Haining Woods, to-from Falkirk, and there’s some nice little bits of singletrack in Callendar Park too.
http://www.strava.com/activities/82856598
Callendar Estate trails themselves are pretty boring – think motorway through the woods.