Signs From Idaho

I-15 south at Exit 167 - ID-22 West/Dubois.

I-15 south approaching Exit 167. Use Exit 167 for Craters of the Moon National Monument.

I-15 South approaching Exit 167 - ID-22/Dubois/Arco. The actual sign at the exit omits Arco from the destination.

I-15 south approaching Exit 172 - Ranch Exit. The destination Ranch Exit was assigned to this interchange, after years of no have a destination. Before no destination, the exit was marked US Sheep Experiment Station.

I-15 south approaching Exit 172 - Ranch Exit.

I-15 south approaching Exit 184 - Stoddard Creek Area

I-15 south approaching Exit 190 - Humphrey. This is the first exit on I-15 south in Idaho.

Speed Limit 80 MPH on I-15 south, just south of the Idaho-Montana border. The speed limit along I-15 is 80 MPH to Idaho Falls.

First distance marker in Idaho along I-15 south. Distance to Spencer, Dubois, and Idaho Falls.

Welcome to Idaho on I-15 south at the Idaho-Montana stateline on Monida Pass.