Loch Riddon: The Quiet Sea-Loch off the Kyles of Bute

Looking up the wooded, mountain-ringed sea-loch of Loch Riddon from the Kyles of Bute in Cowal, Argyll.
Loch Riddon — a hidden sea-loch winding north off the Kyles of Bute. One of Cowal’s quiet gems.

Overview — the loch almost nobody finds

Loch Riddon (also Loch Ruel) is one of those places you could live a lifetime in Scotland and never see. It’s a quiet, wooded sea-loch in the Cowal peninsula, branching north off the famous Kyles of Bute between Kames and Colintraive, and running up to the mouth of Glen Daruel. Ringed by trees and hills, dotted with moored yachts, and looked over by one of the finest views in Scotland from the A8003, it’s serene, unspoilt, and gloriously off the beaten track. We’ve spent happy days here — and it’s home to a superb gravel bike route along its shore.

Where it is

Loch Riddon lies in west Cowal, Argyll, reaching north from the Kyles of Bute (the beautiful narrows between the mainland and the Isle of Bute). Kames and Tighnabruaich sit on the west side of its mouth; Colintraive — with the short ferry to Bute — sits across on the east; and at the head of the loch are Ormidale and the glen of Glendaruel, where the River Ruel flows in. It’s a natural extension of a Cowal tour on the Argyll Coastal Route.

The loch & its setting

The magic of Loch Riddon is its stillness. Wooded slopes come down to the water, the Burnt Islands scatter across the Kyles at its mouth, yachts swing at anchor off Tighnabruaich, and at low tide the head of the loch opens into wide, bird-rich flats. On a calm day the reflections are unreal.

Loch Riddon reaching inland with mountains rising beyond the calm water.
Up the loch toward Glendaruel — hills, water and hardly a soul.
The head of Loch Riddon at low tide, wide tidal flats and wooded hills.
The head of the loch at low tide — quiet, wild, and full of birdlife.
Yachts moored on the calm Kyles of Bute off Tighnabruaich at the mouth of Loch Riddon, reflected in the water.
The Tighnabruaich anchorage at the mouth — a classic Kyles of Bute scene.

The villages & spots around it

  • Kames & Tighnabruaich — the twin villages at the loch’s mouth, and one of Scotland’s great viewpoints (their own page).
  • Colintraive — across the Kyles, with the CalMac ferry to the Isle of Bute (a five-minute crossing).
  • Ormidale & Glendaruel — the quiet head of the loch and the glen behind it, with the River Ruel and old estate woodland.
  • The A8003 viewpoint — the famous high road above Tighnabruaich, looking down over the Kyles and Loch Riddon.
A cottage on the wooded shore of Loch Riddon, the calm loch beyond.
A lochside cottage on Loch Riddon — the definition of getting away from it all.

A bit of history (sourced)

The Kyles of Bute and Loch Riddon were, for centuries, a strategic sea-highway through Argyll, and later the golden route of the Clyde paddle-steamers — Victorian Glasgow came “doon the watter” to Tighnabruaich in their thousands. Today the loch is far quieter, worked mainly by shellfish farms (mussels and oysters thrive in its clean water), and prized by sailors and wildlife alike.

The gravel bike route — Kames to Torr Buidhe

One of the real treats here is a superb gravel bike ride: from Kames and Tighnabruaich, down the west (left) side of the loch to Torr Buidhe, running right along the stunning coastline — quiet, traffic-free, with woodland, wee waterfalls and non-stop loch views. (That’s straight from our own notes and the map below.)

A gravel forest track running along the wooded shore of Loch Riddon, ideal for cycling.
The gravel route — traffic-free, tree-lined and stupidly scenic.
A gravel bike leaning by a mossy waterfall on the shore path of Loch Riddon.
Little waterfalls tumble down to the loch along the way.
A map showing the gravel bike route down the west side of Loch Riddon from Kames and Tighnabruaich to Torr Buidhe.
Our route map: down the left side from Kames/Tighnabruaich to Torr Buidhe, along the coastline.

🗺️ Map — Loch Riddon

Best time to visit

Late spring to autumn for the greenery, the long light and the calm anchorage; a still morning or evening for the reflections. It stays quiet even in season — but west-coast midges appear on windless summer days, so pack repellent.

The Scotland’s Lochs series & nearby

Reality notes

  • 🌊 The loch: quiet sea-loch — sailing, wildlife, shellfish farms; free to enjoy from the shore.
  • 🚲 Gravel ride: Kames/Tighnabruaich → Torr Buidhe, west shore — traffic-free, scenic.
  • ⛴️ Ferry: Colintraive–Rhubodach (CalMac) to Bute, minutes away.
  • 🦟 Midges: likely on still summer days.
  • 🐕 Dogs: brilliant — shore and trails (leads near livestock).

Sources

  • First-hand: Kevin & family, Loch Riddon / Kames / Tighnabruaich (own photos + route notes)
  • On-site: Tighnabruaich Viewpoint (National Trust for Scotland) board
  • Loch Riddon — Wikipedia