[2] Administratively it belongs to the Northeast Greenland National Park.

This island was named after U.S. Arctic explorer James Booth Lockwood (1852-1884).

David Legge Brainard achieved a new "farthest north" record of 83°23'8" on the island at the time of Greely's Lady Franklin Bay Expedition.

On the eastern shore of the island 3 km (1.9 mi) broad Conger Sound separates it from Cape Kane in Roosevelt Land in the mainland whose northernmost point is Cape Washington to the east beyond Hunt Fjord.

[1][2] Cape Christiansen is the headland at the northern end and small Brainard Island lies 2.7 km (1.7 mi) west of the island's western shore.