| Upper Grand Lagoon to Cibolo (Texas) | 748.01 mi (1,203.81 km) |
| Upper Grand Lagoon to Cicero (Illinois) | 814.48 mi (1,310.78 km) |
| Upper Grand Lagoon to Cimarron Hills (Colorado) | 1,231.56 mi (1,982.00 km) |
| Upper Grand Lagoon to Cincinnati (Ohio) | 623.87 mi (1,004.01 km) |
| Upper Grand Lagoon to Cinco Ranch (Texas) | 600.38 mi (966.22 km) |
| Upper Grand Lagoon to Circleville (Ohio) | 671.08 mi (1,080.00 km) |
| Upper Grand Lagoon to Citrus (California) | 1,892.58 mi (3,045.81 km) |
| Upper Grand Lagoon to Citrus Heights (California) | 2,095.09 mi (3,371.72 km) |
| Upper Grand Lagoon to Citrus Park (Florida) | 240.32 mi (386.77 km) |
| Upper Grand Lagoon to Claiborne (Louisiana) | 414.58 mi (667.20 km) |
| Upper Grand Lagoon to Claremont (California) | 1,882.63 mi (3,029.80 km) |
| Upper Grand Lagoon to Claremont (New Hampshire) | 1,173.00 mi (1,887.75 km) |
| Upper Grand Lagoon to Claremore (Oklahoma) | 710.34 mi (1,143.17 km) |
| Upper Grand Lagoon to Clarksburg (Maryland) | 788.63 mi (1,269.17 km) |
| Upper Grand Lagoon to Clarksburg (West Virginia) | 700.68 mi (1,127.63 km) |
