Loch Langabhat, the largest expanse of freshwater in the Outer Hebrides, rises in the hills of North Harris, via the Langadale River and flows in a northerly direction, through the Grimersta chain of four lochs, entering the sea in Loch Roag on the west coast of Lewis via the Grimersta River.
With a length of approximately 7 ½ miles and a shoreline exceeding 30 miles, Langabhat covers an area of 2240 acres and has a maximum depth of 30 metres.
The fishing on Loch Langabhat is shared between five estates (Aline, Grimersta, Morsgail, Scaliscro and Soval) and two angling clubs (Soval Angling Club and Stornoway Angling Association).
Loch Langabhat contains salmon, sea trout, brown trout, charr, sticklebacks and eels, with salmon and brown trout being the main species targeted by anglers.
During 2005, the Loch Langabhat catchment was designated as a Special Area of Conservation (SAC) for Atlantic salmon, under the EU Habitats Directive.

Catch and release guidelines for anglers are:

One salmon and six brown trout per angler/day may be retained and ALL sea trout should be returned. However, anglers should show sensible restraint in what they retain.