| Difficult Run to Bridgeport (Connecticut) | 270.61 mi (435.51 km) |
| Difficult Run to Bridgeton (Missouri) | 703.46 mi (1,132.11 km) |
| Difficult Run to Bridgetown (Ohio) | 391.51 mi (630.07 km) |
| Difficult Run to Bridgeview (Illinois) | 584.40 mi (940.50 km) |
| Difficult Run to Brigham City (Utah) | 1,827.54 mi (2,941.15 km) |
| Difficult Run to Brighton (Colorado) | 1,460.85 mi (2,351.01 km) |
| Difficult Run to Bristol (Connecticut) | 301.28 mi (484.86 km) |
| Difficult Run to Bristol (Tennessee) | 311.40 mi (501.15 km) |
| Difficult Run to Bristol (Virginia) | 306.56 mi (493.36 km) |
| Difficult Run to Broadlands (Virginia) | 12.10 mi (19.47 km) |
| Difficult Run to Broadview Heights (Ohio) | 283.28 mi (455.90 km) |
| Difficult Run to Brock Hall (Maryland) | 32.46 mi (52.24 km) |
| Difficult Run to Brockton (Massachusetts) | 398.17 mi (640.79 km) |
| Difficult Run to Broken Arrow (Oklahoma) | 1,028.15 mi (1,654.65 km) |
| Difficult Run to Bronx (New York) | 228.42 mi (367.61 km) |
