| Upper Grand Lagoon to Cordele (Georgia) | 169.88 mi (273.40 km) |
| Upper Grand Lagoon to Corinth (Mississippi) | 367.50 mi (591.43 km) |
| Upper Grand Lagoon to Corinth (Texas) | 696.74 mi (1,121.30 km) |
| Upper Grand Lagoon to Cornelius (North Carolina) | 462.32 mi (744.03 km) |
| Upper Grand Lagoon to Cornelius (Oregon) | 2,267.72 mi (3,649.55 km) |
| Upper Grand Lagoon to Corning (New York) | 957.73 mi (1,541.32 km) |
| Upper Grand Lagoon to Corona (California) | 1,874.27 mi (3,016.34 km) |
| Upper Grand Lagoon to Coronado (California) | 1,853.91 mi (2,983.59 km) |
| Upper Grand Lagoon to Corpus Christi (Texas) | 723.13 mi (1,163.76 km) |
| Upper Grand Lagoon to Corsicana (Texas) | 647.72 mi (1,042.40 km) |
| Upper Grand Lagoon to Cortland (New York) | 1,008.71 mi (1,623.37 km) |
| Upper Grand Lagoon to Corvallis (Oregon) | 2,262.63 mi (3,641.36 km) |
| Upper Grand Lagoon to Coshocton (Ohio) | 730.93 mi (1,176.32 km) |
| Upper Grand Lagoon to Costa Mesa (California) | 1,894.59 mi (3,049.05 km) |
| Upper Grand Lagoon to Coto de Caza (California) | 1,875.89 mi (3,018.95 km) |
