Situated in the northwestern US, Idaho is the smallest of the eight Rocky Mountain states and 13th in size among the 50 states.
The total area of Idaho is 83,564 sq mi (216,431 sq km), of which land comprises 82,412 sq mi (213,447 sq km) and inland water 1,152 sq mi (2,984 sq km). With a shape described variously as a hatchet, a snub-nosed pistol, and a pork chop, Idaho extends a maximum of 305 mi (491 km) E-W and 479 mi (771 km) N-S.
Idaho is bordered on the N by the Canadian province of British Columbia; on the NE by Montana; on the E by Wyoming; on the S
by Utah and Nevada; and on the W by Oregon and Washington (with part of the line formed by the Snake River). The total boundary length of Idaho is 1,787 mi (2,876 km). The state's geographic center is in Custer County, SW of Challis.