AMP: 278 Location: I-90 and MT-2, Gallatin Cty Reassurance shield after the 2/205 interchange as we pass by Three Forks, so named as this is where the Madison, Jefferson, and Gallatin Rivers merge to form the Missouri River. AMP: 287 Location: I-90 and S-288, Gallatin Cty In a mile, we’ll approach Secondaries 288 and 346. … Continue reading Interstate 90, MT-2/S-205 to S-288/S-346