County Boundary Signs In Montana

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.

Silver Bow County on I-15 north.

Entering Powell County on I-90 West.

Entering Lake County on MT-35 south.

Entering Madison County on MT-55 south.

Entering Silver Bow County on MT-55 south. MT-55 crosses a tiny sliver of Silver Bow County.

Entering Broadwater County on I-90 east at the Jefferson River. The Jefferson River is one of the three forks of the Missouri River, the other two being the Madison and Gallatin Rivers.

Entering Rosebud County on US-212 west.

Entering Powder River County on US-212 west.