Mackay (pronounced MACKee) nicknamed "Top of Idaho" is centrally located in the heart of the Lost River Valley on U.S. Highway 93 about 65 miles from Sun Valley and 90 miles from Idaho Falls on the Peaks to Craters Scenic Byway. 

Situated between the White Knob Mountain Range and the Lost River Mountain Range, Mackay is surrounded by 15 of the 18 highest peaks in Idaho; including Mt. Borah the highest peak in Idaho. Hence the fitting nickname. Surrounded by state and federally protected land, Mackay is a recreational paradise. It has some of the best hunting, fishing, and ATVing in Idaho.