UPDATE: As of February 2014, US 93 has one round trip per day. I-15 will have one round trip per day between Great Falls, Helena, and Butte starting February 20th..
ORIGINAL POST: Salt Lake Express just announced that, effective August 21st, they will be cancelling Route SLE0073 and SLE0074 from Great Falls, MT to Butte, MT on I-15.
Until someone steps in to fill the service, this means Helena and Great Falls will have no intercity service. The only intercity service in Montana will be on I-90 and I-94.