- Medical Lake is a city in Spokane County 15 miles southwest of Spokane on the shores of the lake that bears the same name. The region’s tribes believed the mineral-rich lake had curative properties. The first white settlers arrived in 1872 and they, too, believed the lake had healing powers. By 1879 hotels and bathhouses had sprung up along the shores and tourists came seeking relief from rheumatism and other maladies…