| Walnut Creek to Cloverleaf (Texas) | 1,633.52 mi (2,628.89 km) |
| Walnut Creek to Cloverly (Maryland) | 2,411.45 mi (3,880.86 km) |
| Walnut Creek to Clovis (California) | 149.20 mi (240.12 km) |
| Walnut Creek to Clovis (New Mexico) | 1,076.15 mi (1,731.89 km) |
| Walnut Creek to Clute (Texas) | 1,646.33 mi (2,649.51 km) |
| Walnut Creek to Coachella (California) | 440.16 mi (708.37 km) |
| Walnut Creek to Coalinga (California) | 154.11 mi (248.02 km) |
| Walnut Creek to Coamo (Puerto Rico) | 3,603.29 mi (5,798.94 km) |
| Walnut Creek to Coatesville (Pennsylvania) | 2,459.99 mi (3,958.97 km) |
| Walnut Creek to Cockeysville (Maryland) | 2,425.21 mi (3,903.01 km) |
| Walnut Creek to Cocoa (Florida) | 2,455.15 mi (3,951.19 km) |
| Walnut Creek to Cocoa Beach (Florida) | 2,464.30 mi (3,965.90 km) |
| Walnut Creek to Coconut Creek (Florida) | 2,554.30 mi (4,110.74 km) |
| Walnut Creek to Coeur d'Alene (Idaho) | 727.13 mi (1,170.21 km) |
| Walnut Creek to Cohoes (New York) | 2,532.61 mi (4,075.85 km) |
