| Difficult Run to Berkeley (California) | 2,409.31 mi (3,877.40 km) |
| Difficult Run to Berkley (Colorado) | 1,474.32 mi (2,372.69 km) |
| Difficult Run to Berkley (Michigan) | 393.90 mi (633.92 km) |
| Difficult Run to Berthoud (Colorado) | 1,471.53 mi (2,368.20 km) |
| Difficult Run to Berwick (Pennsylvania) | 159.77 mi (257.12 km) |
| Difficult Run to Berwyn (Illinois) | 585.64 mi (942.49 km) |
| Difficult Run to Bessemer (Alabama) | 658.55 mi (1,059.84 km) |
| Difficult Run to Bethany (Oklahoma) | 1,138.67 mi (1,832.51 km) |
| Difficult Run to Bethany (Oregon) | 2,339.83 mi (3,765.59 km) |
| Difficult Run to Bethel Park (Pennsylvania) | 173.61 mi (279.40 km) |
| Difficult Run to Bethesda (Maryland) | 13.60 mi (21.89 km) |
| Difficult Run to Bethlehem (Pennsylvania) | 158.91 mi (255.74 km) |
| Difficult Run to Bethpage (New York) | 241.39 mi (388.48 km) |
| Difficult Run to Bettendorf (Iowa) | 715.78 mi (1,151.93 km) |
| Difficult Run to Beverly (Massachusetts) | 423.38 mi (681.36 km) |
