Getting to the Forest Enterprise car-park at MILTON near Aberfoyle is easy. Take your favourite route to Aberfoyle (generally the A81 which you pick up either at Maryhill Road or Canniesburn Toll). The A81 takes you through the east end of Milngavie; round the roundabout at Homebase, etc (sign-posted to Strathblane); past the waterworks; on to Strathblane, Dumgoyne, Gartmore House to the new roundabout outside Aberfoyle where you turn left towards Aberfoyle.
YOU MIGHT LIKE TO STOP FOR THE TOILETS AT ABERFOYLE NEAR THE TIC
Then go back onto the main street and continue through Aberfoyle (without turning right up the hill) and drive straight on towards Milton (and Kinlochard and Stronachlachar). After just over a mile, at the restored mill in Milton, turn left off the main road, cross a bridge and follow the road around, bearing right (I think!) at the Forest Enterprise signpost. Turn left into the main car park.
Your walk starts off straight over at the cross-tracks you drove up and continues through the forest to Lochan Gleannan, The lochan is lovely but the next two miles may be a bit of a hike through the forest although you get fine glimpses of Loch Ard below. Then it all gets interesting again as you reach the Aqueduct, the Valve House, Duchray Bridge and Duchray Cottage. .
Continue on past Duchray Castle to Lochan Splingen. If you have time you can go all the way round to take in all the sculptures.