on N coast of Chicagof I., trends SSE from Icy Strait, Alex. Arch. 9.5 miles long.
Named by Captain W. E. George for the excursion steamer Idaho which grounded near the head of the inlet (US@C&GS 1883, p. 190).
The Hobbit Hole, Port Althorp, Dundas Bay, Earl Cove, Elfin Cove, Granite Cove, Gull Cove, Idaho Inlet, Inian Cove, Jacks Cove, Lacy Cove, Lisianski Inlet, Mosquito Cove, Mud Bay, Pelican Harbor, Salt Chuck Bay, Willoughby Cove,
Mount Althorp, Apex Mountain, Basalt Knob, Crag Mountain, Craig Mountain, Mineral Mountain, El Nido Peak, Pass Mountain, Pegmatite Mountain, Pyramid Peak, Tarn Mountain, Vein Mountain, Wedge Mountain,