Our Story

ConoMart Super Stores are part of the GM Petroleum family which was founded in 1964 and is “Locally Owned and Operated” by Dennis Whitmore.  With stores conveniently located in Billings, Laurel and Joliet, Montana, we have the privilege of serving and supporting our state’s farmers, ranchers, local communities, and travelers throughout the region.

At ConoMart we strive to provide all of our customers with a consistent shopping experience that includes: fast and friendly service, competitive prices, clean-modern facilities that are “second to none” and Top-Tier Conoco gasoline and diesel.