[1][2] The name is thought to mean "Loch of Scotland", and it has been suggested that this might derive from the time when the Gaels were expanding their kingdom of Dál Riata eastwards into Pictland.

From here, the River Earn flows eastwards from the loch, through Strathearn, and eventually joins the Firth of Tay some 50 miles (80 km) away.

Just east of Lochearnhead, on the south side of the loch, is Edinample Castle, built by 'Black' Duncan Campbell of Glenorchy in 1584.

As with all damped mechanical systems, applied pressure can result in an oscillation, and the water will return to the opposite end of the loch over time.

In August 1906, Edith Holden visited the Loch and while cycling along the North side observed "the finest Larches she had ever seen".