| Grays to Black Forest (Colorado) | 4,727.50 mi (7,608.17 km) |
| Grays to Blackfoot (Idaho) | 4,758.68 mi (7,658.36 km) |
| Grays to Blackhawk (California) | 5,351.64 mi (8,612.64 km) |
| Grays to Blacksburg (Virginia) | 3,898.84 mi (6,274.58 km) |
| Grays to Blackwells Mills (New Jersey) | 3,514.92 mi (5,656.72 km) |
| Grays to Blaine (Minnesota) | 4,017.60 mi (6,465.71 km) |
| Grays to Bloomingdale (Florida) | 4,428.88 mi (7,127.60 km) |
| Grays to Bloomingdale (Illinois) | 3,980.13 mi (6,405.40 km) |
| Grays to Bloomington (California) | 5,429.16 mi (8,737.39 km) |
| Grays to Bloomington (Illinois) | 4,083.05 mi (6,571.03 km) |
| Grays to Bloomington (Indiana) | 4,050.93 mi (6,519.35 km) |
| Grays to Bloomington (Minnesota) | 4,037.43 mi (6,497.61 km) |
| Grays to Bloomsburg (Pennsylvania) | 3,567.30 mi (5,741.01 km) |
| Grays to Blue Ash (Ohio) | 3,962.92 mi (6,377.71 km) |
| Grays to Blue Island (Illinois) | 3,978.24 mi (6,402.36 km) |
