| Difficult Run to Bay City (Michigan) | 469.22 mi (755.14 km) |
| Difficult Run to Bay City (Texas) | 1,264.10 mi (2,034.38 km) |
| Difficult Run to Bay Point (California) | 2,389.79 mi (3,846.00 km) |
| Difficult Run to Bay Shore (New York) | 251.41 mi (404.61 km) |
| Difficult Run to Bay Village (Ohio) | 300.61 mi (483.79 km) |
| Difficult Run to Bayamón (Puerto Rico) | 1,568.68 mi (2,524.55 km) |
| Difficult Run to Bayonet Point (Florida) | 792.23 mi (1,274.97 km) |
| Difficult Run to Bayonne (New Jersey) | 210.48 mi (338.73 km) |
| Difficult Run to Bayou Blue (Louisiana) | 992.55 mi (1,597.36 km) |
| Difficult Run to Bayou Cane (Louisiana) | 996.40 mi (1,603.54 km) |
| Difficult Run to Bayshore Gardens (Florida) | 847.70 mi (1,364.24 km) |
| Difficult Run to Baytown (Texas) | 1,184.10 mi (1,905.62 km) |
| Difficult Run to Beach Park (Illinois) | 601.76 mi (968.44 km) |
| Difficult Run to Beachwood (New Jersey) | 182.24 mi (293.29 km) |
| Difficult Run to Beachwood (Ohio) | 282.35 mi (454.39 km) |
