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Greyhound Lines serves several communities along I–90, including Billings, Livingston, Bozeman, and Butte. Karst Stage/4x4 Stage has regional service in the Bozeman area, plus service from Bozeman to Big Sky. Rimrock Trailways, which is based in Billings, serves major communities in the state. Skyline is a Big Sky–area bus service that also provides service between Bozeman and Big Sky.
Greyhound Lines (800/231–2222. www.greyhound.com.)
Karst Stage/4x4 Stage (800/845–2778 or 406/556–3500. www.karststage.com.)
Rimrock Trailways (800/255–7655 or 406/245–5392. www.rimrocktrailways.com.)
Skyline (406/995–6287. www.skylinebus.com.)