Follow the riverside path along past the houses and then beside the sports field. There are seats and picnic tables on the way. Climb the steps onto the Holm Bridge, built in 1823, and turn left over the bridge. You may see dippers and other water birds around here.
Further up the trail, the tree cover on the right hides the Liddel Water, but where the trees end, if you look right you can see where the railway line formerly crossed the river. This was locally called the Caul’ Pool Brig, because there was a ‘cauld’ or weir in the river here. The bridge, an impressive arched viaduct, was demolished in 1986. As you approach Mangerton Farm, turn left on to the old railway line (‘Mangerton Walk’ sign). Continue along the old line. There are beautiful wildflowers beside the track in summer. In about 400 metres, steps lead down to the scant ruin of Mangerton Tower on the right. This was one of many Armstrong fortified houses in the Borders. One of the walls carries a carved stone with the initials of a 16th century Armstrong and his wife, a Forster. The tower has been ruined for at least 200 years.
Soon, the path continues climbing gently to reach a gate with a lovely view back over Liddesdale. Head up to a double gate at a minor road near Sorbietrees Farm. Caerba Hill, which has an ancient settlement on its summit, is straight ahead.