| Gateway to Cadillac (Michigan) | 1,237.91 mi (1,992.23 km) |
| Gateway to Caguas (Puerto Rico) | 1,155.65 mi (1,859.84 km) |
| Gateway to Cahokia (Illinois) | 961.72 mi (1,547.74 km) |
| Gateway to Calabasas (California) | 2,249.55 mi (3,620.30 km) |
| Gateway to Caldwell (Idaho) | 2,274.17 mi (3,659.92 km) |
| Gateway to Caledonia (Wisconsin) | 1,172.68 mi (1,887.24 km) |
| Gateway to Calera (Alabama) | 542.35 mi (872.83 km) |
| Gateway to Calexico (California) | 2,061.29 mi (3,317.32 km) |
| Gateway to Calhoun (Georgia) | 578.65 mi (931.24 km) |
| Gateway to California (Maryland) | 865.12 mi (1,392.28 km) |
| Gateway to California City (California) | 2,209.74 mi (3,556.24 km) |
| Gateway to Callaway (Florida) | 337.70 mi (543.48 km) |
| Gateway to Calumet City (Illinois) | 1,089.87 mi (1,753.98 km) |
| Gateway to Calverton (Maryland) | 905.65 mi (1,457.50 km) |
| Gateway to Camano (Washington) | 2,642.67 mi (4,252.96 km) |
