| Big Horn County Courthouse | |
| Big Horn County, Wyoming | Rebecca Hein |
| Big Horn River Pilot, early Thermopolis, Wyo. newspaper | Rebecca Hein |
| Big Muddy Oil Field | |
| Big Muddy Oil Field | Rebecca Hein |
| Big Nose George | Lori Van Pelt |
| Big Piney Branch Library | |
| Big Piney, Wyoming | Ann Chambers Noble |
| Big Sandy Crossing | |
| Big Sandy Crossing | WyoHistory.org |
| Bighorn Basin Geoscience Center | |
| Bighorn Basin, Mormon colonizers in | Darcee Barnes |
| Bighorn Basin, Natural History of the | Emilene Ostlind |
| Bighorn Canyon National Recreation Area | |
| Bighorn National Forest | |
| Bill Barlow’s Budget newspaper | Rebecca Hein |
| Bishop, Charles, forty-niner, death and grave of | Randy Brown |
| Bissonette family and 1868 wagon train attack | Rebecca Hein |
| Black 14 sites on the University of Wyoming campus | |
| Black 14, Hamilton, Mel, former University of Wyoming football player on his life and the | Phil White |
| Black 14, the | Phil White |
| Black and Yellow Trail | Robert G. and Elizabeth L. Rosenberg |
| Black and Yellow Trail | |
| Black Diamond Historic Mine Trail | |
| Black Elk, Oglala Lakota holy man | Rebecca Hein |
| Black Hills National Forest | |
| Black Kettle, Oglala Lakota man killed in 1903 | Rebecca Hein |
| Black Thunder Coal Mine | |
| Black, Dr. Willie, Chancellor of the Black Student Alliance in 1969, on the Black 14 | Wyoming State Archives |
| Blackwater firefighters memorial | |
| Blackwater forest fire, 1937 | Kerry Drake |
| Blizzard of 1949 | Rebecca Hein |
| Boarding Schools, Indian, in Wyoming and nationwide | Geoffrey O’Gara |
| Boissevain, Inez Milholland, suffragist and orator | Lesley Wischmann |
| Boundary, western Wyoming, survey of, 1874 | Lucia McCreery |
| Boysen Dam | |
