| Blackrock to Cookeville (Tennessee) | 3,854.47 mi (6,203.17 km) |
| Blackrock to Coolidge (Arizona) | 4,998.95 mi (8,045.03 km) |
| Blackrock to Coon Rapids (Minnesota) | 3,721.33 mi (5,988.90 km) |
| Blackrock to Cooper City (Florida) | 4,149.80 mi (6,678.46 km) |
| Blackrock to Coos Bay (Oregon) | 4,818.07 mi (7,753.93 km) |
| Blackrock to Copiague (New York) | 3,159.43 mi (5,084.61 km) |
| Blackrock to Coppell (Texas) | 4,462.47 mi (7,181.66 km) |
| Blackrock to Copperas Cove (Texas) | 4,594.13 mi (7,393.54 km) |
| Blackrock to Coral Gables (Florida) | 4,166.93 mi (6,706.02 km) |
| Blackrock to Coral Springs (Florida) | 4,137.12 mi (6,658.04 km) |
| Blackrock to Coral Terrace (Florida) | 4,166.09 mi (6,704.68 km) |
| Blackrock to Coralville (Iowa) | 3,822.19 mi (6,151.22 km) |
| Blackrock to Coram (New York) | 3,134.59 mi (5,044.63 km) |
| Blackrock to Corcoran (California) | 5,092.64 mi (8,195.80 km) |
| Blackrock to Cordele (Georgia) | 3,991.53 mi (6,423.74 km) |
