Linked from
The 5 pages that link to Idaho, each with the reason it gives.
OregonRelated: The Snake River marks much of Oregon’s eastern border with Idaho.
WyomingRelated: Idaho meets Wyoming at the western edge of the state’s mountain country.
BoiseNarrower topic: Boise is Idaho’s state capital and largest city.
Borah PeakNarrower topic: Borah Peak is the highest point within Idaho.
HelicoprionRelated: Important Helicoprion fossils, including the holotype, were found in Idaho.