A spectacular and challenging section of coast, clamber through the entrails of a volcano below the crumbling cliffs of Tantallon Castle.

THE ROCKS: A good mix of East Lothian’s volcanic rocks are found here – we’ll pass through two volcanic vents complete with agglomerate and intrusions of basalt, and also visit the rocks outside the vents – including sandstone, and layers of green and red volcanic ash.

THE WALK: This is a tough walk, involving clambering over sections of rock that will be slippery. From Tantallon Castle we walk along a short section of road to Canty Bay and descend to the shore. We then follow the rocky shore eastwards around Gin Head and beneath the cliffs to Seacliff, where we re-join the road and return to Tantallon. Distance 7 km. I have classified this as an Adventurous Walk: involving rocky beaches, clambering over rocks and steep climbs. It may be wet, windy or cold. Come equipped with strong footwear, waterproof clothing and something to eat and drink.

MEETING POINT & ROUTE: Tantallon Castle car park, immediately adjacent to the A198, 4 km east of North Berwick. Grid reference NT 591 848 | Nearest Postcode: EH39 5PN | What3Words: grumbles.develop.relocated | Route Map.