Blaiklock Island (67°33′S67°4′W) is a high and rugged, irregular-shaped island 14 km (9 mi) long, lying between Bigourdan Fjord and Bourgeois Fjord. It is separated from Pourquoi Pas Island by The Narrows and from the west coast of Graham Land by Jones Channel. The feature was partially surveyed in 1936 by the British Graham Land Expedition under Rymill, at which time it was charted as a promontory. It was determined to be an island in 1949 by Kenneth V.