Loch Goil; (Scottish Gaelic: Loch Goil) is a small sea loch forming part of the coast of the Cowal peninsula in Argyll and Bute, Scotland. The sea loch is entirely within the Loch Lomond and The Trossachs National Park. The landscape at Loch Goil shows its remoteness and Highland grandeur with the Arrochar Alps surrounding with conifers in the Highlands of Scotland. It is used for exercises by Trident submarines from HMNB Clyde at Faslane. In 2014 Loch Goil was declared a Nature Conservation Marine Protected Area (NCMPA).