North Hermitage Street (B6357)
The B6357 is Liddesdale's spine: from the border at Kershopefoot, where Kershope Burn meets the Liddel Water, it follows the river north through Newcastleton, a planned weaving village of 1793, then six more miles up the dale to Saughtree and on into Wauchope Forest. Dual-track, mostly well surfaced and 21 miles long, it runs in long open radii rather than technical corners; a road for settled rhythm, with the Kielder turn at Saughtree the only real decision on the way.
The valley floods: Storm Dennis in February 2020 wrecked Dawston Bridge at Saughtree and shut the road for ten weeks that summer. Hermitage Castle, up the B6399 from the Hermitage Water junction, is closed November to March.