| Boysen Dam, History of | Annette Hein |
| Bozeman Trail | |
| Bozeman Trail Museum | |
| Bozeman Trail sign and marker | |
| Bozeman Trail, brief history | Marilyn J. Drew |
| Brazil, Pedro II, emperor of | Phil Roberts |
| Bridger Trail | James A. Lowe, Wyoming State Historic Preservation Office |
| Bridger Trail through the Bridger Mountains | |
| Bridger Valley Historic Byway | |
| Bridger, Jim | James A. Lowe, Wyoming State Historic Preservation Office |
| Brinton Museum, The | |
| Brooks, Bryant | Wyoming State Archives |
| Brown's Park | |
| Brown, Melville C. | Kim Viner |
| Bucking-horse logo, Wyoming | Rebecca Hein |
| Buffalo Bill and the Pony Express | Tom Rea |
| Buffalo Bill Center of the West | |
| Buffalo Bill Dam | The National Park Service |
| Buffalo Bill Dam | |
| Buffalo Bill Historical Center | |
| Buffalo Bill State Park | |
| Buffalo Bill, Wyoming Town Founder and Irrigation Tycoon | Robert E. Bonner |
| Buffalo Soldiers, Wyoming and the West | Tom Rea |
| Bureau of Land Management | |
| Bureau of Land Management, founding of | Russel L. Tanner |
| Burlington Railroad in Wyoming | Gregory Nickerson |
| Burnt Ranch | WyoHistory.org |
| Buxton, John, Wyoming deputy game warden, killed in 1919 | Dick Blust, Jr. |
| Byrd, Liz, Wyoming legislator | Lori Van Pelt |
| Byron Museum | |
| CallAir Museum | |
| Cambria Casino/Flying V Lodge | |
| Camp Douglas Officers’ Club State Historic Site | |
| Camp Monaco | |
| Camp Monaco | John Clayton |
| Campbell County Rockpile Museum | |
