Boothia, a peninsula of British North America, lat. 69° to 72° N.; long. 92° to 97° W. It was discovered by Captain Ross (1830), and was called Boothia Felix after the fitter-out of the expedition. Sir Felix Booth. The north magnetic pole is situate in Boothia. It forms the west side of the Gulf of Boothia, from which the Prince Regent's inlet leads into Baffin's Bay. Lakes and inlets almost separate Boothia from the American shore, and it is separated from North Somerset Island by Bellot Strait.