​Loch Morar - deepest freshwater loch in the British Isles

Question

Loch Morar is a long freshwater loch in the Lochaber area of the Scottish Highlands, in the rugged “Rough Bounds” west of Fort William. It’s widely known as the deepest freshwater loch in the British Isles, reaching about 310 m (≈1,017 ft) at its deepest point.

Geography and physical features

• Shape & size: An elongated loch running roughly east–west, about 18.8 km long with a surface area around 26.7 km².

• Depth: Maximum depth commonly reported at ~310 m, with an average depth around ~86 m in some surveys/summaries.

• Glacial origin: Formed by glacial processes after the last ice age.

Hydrology

• Main inflow: River Meoble (plus other streams/tributaries).

• Outflow: River Morar.

Ecology

Loch Morar is often described as clear and nutrient-poor (oligotrophic)—conditions that shape its aquatic plant and animal communities.

Access and recreation

The loch lies near the villages of Morar and Mallaig (West Highland Line / “Road to the Isles” area). People visit for scenery, walking/hiking routes, and nature-focused trips.

Folklore: “Morag”

Loch Morar also has its own legendary loch creature, “Morag”, with reported sightings going back to the late 19th century in popular accounts.