Tarbet and Loch Long
At Tarbet the road forks. The loch narrows behind you. Take the left fork onto the A83 and the landscape changes register immediately — the mountains tighten around the road, the sky narrows and the character of the journey shifts.
Arrochar sits at the head of Loch Long — a deep sea loch running south towards the Firth of Clyde, its water darker and more serious than Loch Lomond’s. The Cobbler dominates the skyline above the village — a mountain with a profile so distinctive that once you have seen it you will recognise it instantly for the rest of your life. The rocky tor at its summit looks hand-placed. On a morning with cloud moving fast across the ridge it looks almost fortified.
Just past Arrochar, the road rounds the head of Loch Long and heads northwest into the glen. A couple of miles along, divers pull off the road at an unmarked layby — Conger Alley, one of Scotland’s most celebrated shore dive sites, its boulder reef home to conger eels, lobsters and a hidden marine world that the surface of the loch gives no indication of.

A climb out of Loch Lomond country into one of the WC300 Core Route’s most memorable Highland passes.

Rest and Be Thankful after the rain

On the WC300, the journey changes character somewhere on the western shore of Loch Lomond — differently for everyone, and usually when you are least expecting it.

From Arrochar the road climbs through Glen Croe — a long, serious ascent through a valley that narrows as it rises, the hillsides steep on both sides, the burn below running fast over dark rock.
In the 1740s, following the Jacobite uprisings, soldiers of the 24th Regiment were sent here to build a military road from Dumbarton to Inveraray. It was hard, methodical work in punishing conditions. When the road was finished they erected a stone at the summit of the pass to mark what they had done. The original inscription is thought to have read: “Rest, and Be Thankful. This road was made in 1748 by the 24th Regiment. Lord Ancram, Colonel.”
The original stone is gone. A replacement stands in its place. The name has never changed.
Standing at the top of the pass, looking back down Glen Croe, the sentiment remains entirely reasonable. This is one of the finest viewpoints on the entire WC300 Core Route — take the time to stop, get out of the car and stand in it properly.

The descent into Glen Kinglas feels like a door opening.
The valley widens. The sky expands. The light changes quality — softer, more golden, less dramatic than the country behind you. This is Argyll now, and it has its own character entirely.
The road runs down to the head of Loch Fyne and turns south along the shore. The loch is long and still — the longest sea loch in Scotland, stretching around forty miles inland from the Sound of Bute. The opposite hills are dark with forestry, the occasional farmhouse white against the slope. A small boat moves slowly in the middle distance, leaving a thin wake that closes behind it almost immediately.
Loch Fyne oysters have become one of Scotland’s best-known food names — supplied to Michelin-starred restaurants, served at Champions League Finals and stocked by Selfridges, all from a farm that began as a modest operation on this shoreline in 1978. The original oyster bar still sits beside the A83 at the head of the loch, as close to the water as it is possible to get. Eating here, with the loch directly in front of you and the hills closing in on both sides, is one of those rare occasions when the provenance of what is on the plate is entirely, visibly obvious.
If there is an argument for stopping on this segment, Loch Fyne makes it.

Inveraray announces itself before you arrive — white buildings visible across the loch from the south, sitting at the water’s edge with a composure that feels almost theatrical until you realise it is simply the result of having been planned properly.The town was built in the eighteenth century by the third Duke of Argyll, who demolished the existing settlement and constructed an entirely new one to complement his rebuilt castle. The result is one of the most architecturally coherent small towns in Scotland — Georgian facades on the main street, a church designed to serve both Gaelic and English-speaking congregations, a jail that operated until 1889 and now tells its stories with considerable frankness.
The castle sits just beyond the town in grounds that have been managed for three hundred years. The quayside is where most people eventually end up — the loch in front, the hills behind, a coffee from somewhere nearby and no particular agenda.
By the time you sit down here and look back at the road just driven, something has shifted. The journey has found its rhythm. The west coast has introduced itself properly.
Everything that follows builds on this.