In the middle of the island, the Caledonian MacBrayne passenger ferry MV Carvoria operates from the Gallanach Road (about 3 km or 2 mi southwest of Oban).

The northern tip of the island can be accessed by a separate marina ferry service operating from North Pier in the centre of Oban.

The artist J. M. W. Turner visited Kerrera in 1831 and made 25 sketches of the castle[9] which are in the Tate Gallery, London.

The four-acre (1.6 ha) tidal island at the north-east tip of Kerrera, Rubh a' Chruidh, was sold for £426,000 in 2010 to Lanarkshire businessman David Hamilton.

[14] The oldest bedrock of Kerrera is black slate ascribed to the Easdale Subgroup of the Dalradian Argyll Group.

Ripple marks and sun cracks are preserved in shale strata on the south coast, belying the subaerial environment in which deposition of these sediments took place.