I-90 east approaching Exit 278 - MT-2/MTS-205/Three Forks/Trident.
I-90 West - Exit 274
I-90 west at Exit 274 - US-287/Helena/Ennis.
I-90 West - Broadwater 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.
I-90 West - Exit 278
I-90 west approaching Exit 278 - MT-2/MTS-205/Three Forks.