| Boulder to Chantilly (Virginia) | 1,479.51 mi (2,381.05 km) |
| Boulder to Chaparral (New Mexico) | 555.14 mi (893.42 km) |
| Boulder to Chapel Hill (North Carolina) | 1,449.96 mi (2,333.48 km) |
| Boulder to Charleston (Illinois) | 906.34 mi (1,458.61 km) |
| Boulder to Charleston (South Carolina) | 1,485.19 mi (2,390.18 km) |
| Boulder to Charleston (West Virginia) | 1,266.51 mi (2,038.25 km) |
| Boulder to Charlotte (North Carolina) | 1,372.66 mi (2,209.08 km) |
| Boulder to Charlottesville (Virginia) | 1,437.74 mi (2,313.83 km) |
| Boulder to Chaska (Minnesota) | 678.98 mi (1,092.72 km) |
| Boulder to Chatham (Illinois) | 824.64 mi (1,327.13 km) |
| Boulder to Chattanooga (Tennessee) | 1,145.29 mi (1,843.17 km) |
| Boulder to Cheat Lake (West Virginia) | 1,342.85 mi (2,161.10 km) |
| Boulder to Chelsea (Alabama) | 1,128.07 mi (1,815.46 km) |
| Boulder to Chelsea (Massachusetts) | 1,774.17 mi (2,855.26 km) |
| Boulder to Cheney (Washington) | 801.09 mi (1,289.24 km) |
