| Walnut Creek to Carlsbad (California) | 424.76 mi (683.58 km) |
| Walnut Creek to Carlsbad (New Mexico) | 1,072.91 mi (1,726.68 km) |
| Walnut Creek to Carmel (Indiana) | 1,921.40 mi (3,092.19 km) |
| Walnut Creek to Carmichael (California) | 63.55 mi (102.27 km) |
| Walnut Creek to Carney (Maryland) | 2,431.85 mi (3,913.68 km) |
| Walnut Creek to Carnot-Moon (Pennsylvania) | 2,225.27 mi (3,581.23 km) |
| Walnut Creek to Carol Stream (Illinois) | 1,806.41 mi (2,907.13 km) |
| Walnut Creek to Carolina (Puerto Rico) | 3,611.36 mi (5,811.92 km) |
| Walnut Creek to Carolina Forest (South Carolina) | 2,411.16 mi (3,880.39 km) |
| Walnut Creek to Carpentersville (Illinois) | 1,797.69 mi (2,893.10 km) |
| Walnut Creek to Carpinteria (California) | 280.29 mi (451.09 km) |
| Walnut Creek to Carrboro (North Carolina) | 2,355.70 mi (3,791.13 km) |
| Walnut Creek to Carroll (Iowa) | 1,460.68 mi (2,350.73 km) |
| Walnut Creek to Carrollton (Georgia) | 2,080.18 mi (3,347.73 km) |
| Walnut Creek to Carrollton (Texas) | 1,450.41 mi (2,334.20 km) |
