| Walnut Creek to Cibolo (Texas) | 1,480.02 mi (2,381.87 km) |
| Walnut Creek to Cicero (Illinois) | 1,825.73 mi (2,938.23 km) |
| Walnut Creek to Cimarron Hills (Colorado) | 940.10 mi (1,512.95 km) |
| Walnut Creek to Cincinnati (Ohio) | 2,016.24 mi (3,244.82 km) |
| Walnut Creek to Cinco Ranch (Texas) | 1,603.74 mi (2,580.97 km) |
| Walnut Creek to Circleville (Ohio) | 2,093.75 mi (3,369.56 km) |
| Walnut Creek to Citrus (California) | 349.58 mi (562.59 km) |
| Walnut Creek to Citrus Heights (California) | 68.26 mi (109.86 km) |
| Walnut Creek to Citrus Park (Florida) | 2,367.10 mi (3,809.48 km) |
| Walnut Creek to Claiborne (Louisiana) | 1,716.92 mi (2,763.12 km) |
| Walnut Creek to Claremont (California) | 355.58 mi (572.25 km) |
| Walnut Creek to Claremont (New Hampshire) | 2,594.32 mi (4,175.15 km) |
| Walnut Creek to Claremore (Oklahoma) | 1,455.61 mi (2,342.58 km) |
| Walnut Creek to Clarksburg (Maryland) | 2,395.75 mi (3,855.59 km) |
| Walnut Creek to Clarksburg (West Virginia) | 2,234.72 mi (3,596.44 km) |
