Sgurra Bhreac (alternative spelling 'Sgurra Breac'), sometimes referred to as the Big Rock, is a Canadian peak located in the East Bay Hills of Cape Breton Island, an extension of the Appalachian mountain chain in the province of Nova Scotia. Sgurra Bhreac is a prominent rock outcrop, rising from the northern edge of The Big Barren, between the Breac Brook and Glengarry Valleys, and is the highest elevation point on Cape Breton Island south of the Bras d'Or Lake with its summit at .