Arthur's Seat Edinburgh

Arthur’s Seat: The Volcano in Edinburgh That Helped Invent Geology

Arthur’s Seat is a 350-million-year-old extinct volcanic plug rising 251 metres above Edinburgh in Holyrood Park, 10 minutes’ walk from the Royal Mile. It is also, in a specific historical sense, where the scientific understanding of geology was born. In 1788, James Hutton stood on the Salisbury Crags below Arthur’s Seat and observed the unconformity now called Hutton’s Section, a place where younger sandstone lies horizontally on top of older tilted greywacke, the angular discordance showing that enormous amounts of geological time had passed between the two formations. Hutton concluded that the earth must be vastly older than the 6,000 years then assumed from Biblical genealogy. “We find no vestige of a beginning, no prospect of an end,” he wrote. The phrase was the beginning of modern geology as a science.

The same rock face is still there, just east of the main path up the crags, marked with a small plaque.

The Climb

Arthur’s Seat is a genuine hill climb, not a stroll, but accessible without technical equipment. The most popular route from the St Margaret’s Loch car park near Holyrood Palace takes 45-60 minutes. The summit at 251 metres gives 360-degree views: Edinburgh Castle and the Old Town roofscape to the west, the Firth of Forth and the Kingdom of Fife to the north, East Lothian and the Pentland Hills in other directions. On clear days the Bass Rock and Traprain Law are visible, and sometimes the Borders hills to the south.

The view at dawn, before the city wakes, is one of the genuinely distinctive Edinburgh experiences. You are on a volcanic peak in a capital city watching the sun come up over the sea.

Holyrood Park

The park surrounding the hill contains Salisbury Crags (basalt columns visible from the main climbing path), the ruins of St Anthony’s Chapel (15th century), three lochs, and the Palace of Holyroodhouse on the park’s western boundary. Entry to the park is free, 24 hours. The Holyroodhouse itself requires a ticket (around £17 for the state apartments).

Practical Notes

Wear sturdy footwear rather than trainers on wet days, the basalt can be slippery when wet and the upper path involves scrambling over rock. Weather changes quickly on the summit; take a layer. The recommended route is the southern approach via the Volunteer’s Walk rather than the more direct but steeper rock scramble if you have any doubt about your footing.