Loch Fada (English: Long Lake) is a loch located on the Inner Hebridean island of Colonsay, Scotland. It extends between Kiloran and Lower Kilchattan approximately 3 km (1.9 mi) and is the largest loch on Colonsay. It is located at grid reference NR385955
The loch consists of a string of three lochs and is a Designated Special Area of Conservation (SAC).
Coordinates: 56°04′53″N 6°12′20″W / 56.08147°N 6.20556°W