County Boundary Signs In Montana

Entering Fallon County on US-12 west.

Stillwater County on I-90 east.

Beaverhead County on MT-41 south. Beaverhead County is the largest county by area in Montana.

Entering Granite County on I-90 East.

Entering Lewis and Clark County on I-15 south.

Entering Cascade County at Belt Creek bridge on MTS-228 south.

Entering Chouteau County on US-87 south.

Entering Blaine County on US-2 east.

Entering Lewis and Clark County on I-15 north. Lewis and Clark County is home to Helena, the Montana state capital.

Entering Jefferson County on I-15 north.