Loch Eck is a freshwater loch located on the Cowal Peninsula, north of Dunoon, in Argyll and Bute, west of Scotland. It is seven miles long. It is oriented in a north-south direction. Its main inflow, at the northern end, is the River Cur, and its main outflow, at the southern end, is the River Eachaig, which meanders somewhat within the confines of the broad …Loch Eck is a freshwater loch located on the Cowal Peninsula, north of Dunoon, in Argyll and Bute, west of Scotland. It is seven miles long. It is oriented in a north-south direction. Its main inflow, at the northern end, is the River Cur, and its main outflow, at the southern end, is the River Eachaig, which meanders somewhat within the confines of the broad strath before flowing into the head of Holy Loch, about 5 km further south.