Braal Castle is located by the River Thurso north of the village of Halkirk, in Caithness, northern Scotland.

The site may have been occupied by Harold II of Orkney, Mormaer of Caithness (d. 1206), although the present building is of the fourteenth century.

[1] The "Castle of Brathwell" was granted by King Robert II of Scotland to his son, David Stewart, Earl of Caithness.

In 1450, the castle was bestowed by James II upon Sir George Crichton, Lord High Admiral of Scotland, who was briefly created Earl of Caithness in 1452.

In 1455, the earldom and castle were granted by James II to William Sinclair, Baron of Roslin and Lord Chancellor of Scotland.