Start up Glenvale (car park just up the road from path) Mind the steps. Brings you to bottom of West Lomond. Continue passed down towards the woods passed the res. Come up the hill to where the weather station thingy is and the along the top of Bishops and back down at the end near West Lomond, fantastic decescent, a lot of 'rear-wheel in the air' stuff. For short route return along Glanvale, much better in this direction.
For long route, it's a carry up West Lomond, then down on the north side, which then loops around and follow the landrover track towards East Lomond, across the road at Craigmead and back onto the Landrover track all the way to the rdio masts (East Lomond on your left as you go passed it)
East Lomond is ridable up from the masts. Come down towards the closest trees (northish) This is in there http://www.youtube.com/watch?v=DbAY4D61HJ4
Pub in Falkland (Stag is good) Road climb back to Craigmead (ridable but not great in that direction up Maspie Den) Passed Craigmead then right onto fram track, continue along passed res, West Lomond on your right. Turn right at the big track and back down Glenvale.
Get an OS map to see what I'm on about.