Coll is an island located west of the Isle of Mull in the Inner Hebrides of Scotland. Coll is recognized for its sandy beaches, which rise to form large dune, for its corncrakes, and for Breacachadh Castle. It remains in the council area of Argyll and Bute. Coll is about 13 miles (20 kilometres) long by 3 miles (5 km) wide and also has a population of around 150. Coll's sandy coastlines rise to form large dune. The acme on Coll is Ben Hogh in the mid west of the island, a ridge with 2 tops running NW/SE, which climbs initially to an elevation of 104 metres (341 ft) with a triangulation pillar, and to 106 metres (348 feet) 450 metres (492 yd) to the southeast. In the 2011 census, the island's population was recorded as 195, standing for an increase over the previous decade of virtually 19%.