I-15 South Approaching I-90
I-15 south approaching I-90 (Exit 129) to Billings and Butte. I-15 joins I-90 westbound through Butte.
I-15 South - Butte Historic District
I-15 south approaching I-90. Use I-90 West (next exit) for the Butte Historic District.
I-15 South at I-90
I-15 south at I-90. Use left Exit 129 for I-90 East to Billings. Use right lane for I-15 South/I-90 West to Butte. I-15 joins I-90 west through Butte.
I-15 South/I-90 West - Exit 127
I-15 South/I-90 West approaching Exit 127 - BL-15/BL-90/Harrison Ave.
I-15 South - Exit 129
I-15 south approaching Exit 129 - I-90 East/Billings. Continue south on I-15/I-90 West to Butte. I-15 joins I-90 through Butte.
I-15 South - Exit 129
I-15 south approaching Exit 129 - I-90 East/Billings. I-15 South joins I-90 West to Butte.
I-15 North/I-90 East - Exit 129
I-15 North/I-90 East approaching Exit 129 - I-15 North/Helena. Continue east on I-90 for Billings.