The chamber of commerce visitor center is at 815 South 27th Street (406/245-4111 or 800/735-2635, http://billingscvb.visitmt.com ). The main post office is directly behind the chamber of commerce at South 26th Street and 9th Avenue South. The downtown branch is at 2602 1st Avenue North.
The Fish, Wildlife, and Parks office is at 2300 Lake Elmo  Drive (406/247-2940). The Custer National Forest headquarters is at 2602 1st Avenue North (406/248-9885). The Bureau of Land Management office can be reached at 406/255-2888.
Billings  is the largest air link in Montana. Horizon, United, Delta, Frontier, Allegiant, and Northwest each fly into Logan Field several times daily. Logan Field sits atop the Rimrocks  at the junction of Airport Road and North 27th Street.
Hertz, Budget, Avis, and National all operate car rental agencies at the airport.
Rimrock Stages buses (2501 1st Ave. N., 800/255-7655, www.rimrocktrailways.com ) provides service to communities along I-94 and to Denver along I-90.