An eastern tributary of the Scarfmoor Burn passes into the western side of the loch.

[1] It is described as a "large shallow loch with brown trout averaging 8-10 oz and some over 2 lbs.

[3] Archaeologists excavating at the site discovered stone tools dated to the Neolithic period and peat ash.

[3] The Loch of Houll is home to the Whalsay Model Yacht Club, which has a boathouse on the shore.

Locals join in with the festivities during which sailing is followed by Christmas dinner, and a bonfire and fireworks are lit later.