| San Marcos to Chicago Ridge (Illinois) | 1,708.10 mi (2,748.92 km) |
| San Marcos to Chickasha (Oklahoma) | 1,106.30 mi (1,780.43 km) |
| San Marcos to Chico (California) | 525.11 mi (845.08 km) |
| San Marcos to Chicopee (Massachusetts) | 2,488.49 mi (4,004.84 km) |
| San Marcos to Chillicothe (Ohio) | 1,940.25 mi (3,122.53 km) |
| San Marcos to Chillum (Maryland) | 2,262.56 mi (3,641.23 km) |
| San Marcos to Chino (California) | 65.09 mi (104.76 km) |
| San Marcos to Chino Hills (California) | 64.69 mi (104.10 km) |
| San Marcos to Chino Valley (Arizona) | 295.09 mi (474.90 km) |
| San Marcos to Chippewa Falls (Wisconsin) | 1,595.80 mi (2,568.19 km) |
| San Marcos to Choctaw (Oklahoma) | 1,145.68 mi (1,843.80 km) |
| San Marcos to Chowchilla (California) | 324.49 mi (522.22 km) |
| San Marcos to Christiansburg (Virginia) | 2,082.92 mi (3,352.13 km) |
| San Marcos to Chubbuck (Idaho) | 723.16 mi (1,163.82 km) |
| San Marcos to Chula Vista (California) | 36.23 mi (58.31 km) |
