Holy Loch Marina sits on the Cowal Peninsula at the eastern end of Holy Loch, a sea loch opening onto the Firth of Clyde in Argyll and Bute, Scotland.

Nestled in the lee of White Farlane Point near the village of Sandbank, it is accessible by ferry from Gourock in about 20 minutes. Loch Long and the Upper Firth of Clyde are a short sail away.

The site has deep maritime roots: two boat-building yards operated here in the late 19th century, and the loch later served as a Royal Navy and then US Navy submarine base until 1992.

Today the marina offers full berthing and boatyard facilities for visiting and resident craft, and positions itself as a gateway to the Loch Lomond and Trossachs National Park.