Description & Facts: Billings is the largest city in Montana, with an estimated 100,000 people. As a destination in itself, Billings does a significant amount of convention business and is also the host to various regional events such as music festivals, athletic contests, rodeos, and outdoor activities. Billings hosts the largest hospitals in a 500-mile radius, as such the medical profession is a major source of employment in the area. Billings also is a frequent overnight or meal stop for westbound visitors to Yellowstone National Park, as it is the last major city for visitors going to the park via the Beartooth Highway. What to do in Billings, Montana? Billings, MT Events Calendar - Events calendar for Billings, Montana (billingsbulletin.com ). Local Horse rides - Local events (www.billingsmontanaweb.com). Pappy's Adventures - Outdoor family and group adventure. Montana Events Calendar - Statewide Montana Events Calendar. Whoopah Ride - New 2007, 2008 daily country adventure. Billings Mustangs - Minor League Baseball - Watch a game this year in Cobb Field, or next year in the new Billings ballpark currently under construction.