1 A clear tree-covered track runs parallel to the car park. Go through the barrier on to it and turn left. This is now the line of the railway. Follow it beneath a bridge to a residential road and go straight across, around a barrier. Continue behind a row of houses and cross beneath the road again. The path then vaults the canal on a bridge that you should note as it marks the spot where you leave the waterside on the return leg. Continue parallel to the canal for a while, then duck back into woodland, keeping straight ahead at a junction, waymarked right to the canal. The path passes beneath deciduous trees made up mainly of oak, birch and ash. You're likely to see many small birds, especially those of the garden variety, including most members of the tit family, robins and wrens.
2 About 1¼ miles (2km) after crossing the canal, you'll come to a gate and a car park on the outskirts of the small village of Llanfoist, which grew up on the transport links of the area. Its lime kilns were fed by limestone quarried on the flanks of Blorenge and brought down to the canal by another tramway. Turn right, cross the main road and walk up the lane opposite. This passes the church on the left and climbs steeply up to the canal by the boatyard. The lane swings sharply left and right and then, before you actually cross the canal, follow the signs on to the tow path.
3 Continue along the bank, which is particularly beautiful in autumn when the magnificent beech woods show off a full spectrum of autumn colours. After about a mile (1.6km), you'll cross a bridge to continue on the south bank, with some canalside houses taking prime waterfront locations opposite. Shortly after this you come to the Govilon Boat Yard, where an interpretation board maps out many interesting facets of the canal's history. Govilon, like its neighbour Llanfoist, came about because of its position between the natural resources of the mountains and the developing transport network. It was ideally positioned to receive stone from Clydach, which was then transferred to the canal by tram.
4 Pass the impressive boat club and another attractive waterside building and then, at the bridge, fork left to climb steps away from the canal. This leads back on to the disused railway where you bear left to follow it back into the residential area and on to the car park.