| Walnut Creek to Cadillac (Michigan) | 1,940.21 mi (3,122.47 km) |
| Walnut Creek to Caguas (Puerto Rico) | 3,614.86 mi (5,817.56 km) |
| Walnut Creek to Cahokia (Illinois) | 1,721.04 mi (2,769.75 km) |
| Walnut Creek to Calabasas (California) | 321.12 mi (516.80 km) |
| Walnut Creek to Caldwell (Idaho) | 486.28 mi (782.59 km) |
| Walnut Creek to Caledonia (Wisconsin) | 1,817.55 mi (2,925.06 km) |
| Walnut Creek to Calera (Alabama) | 2,000.11 mi (3,218.86 km) |
| Walnut Creek to Calexico (California) | 515.68 mi (829.91 km) |
| Walnut Creek to Calhoun (Georgia) | 2,068.43 mi (3,328.81 km) |
| Walnut Creek to California (Maryland) | 2,450.78 mi (3,944.14 km) |
| Walnut Creek to California City (California) | 299.11 mi (481.38 km) |
| Walnut Creek to Callaway (Florida) | 2,142.46 mi (3,447.95 km) |
| Walnut Creek to Calumet City (Illinois) | 1,837.38 mi (2,956.98 km) |
| Walnut Creek to Calverton (Maryland) | 2,414.84 mi (3,886.31 km) |
| Walnut Creek to Camano (Washington) | 710.89 mi (1,144.07 km) |
