| San Marcos to Clarksdale (Mississippi) | 1,527.38 mi (2,458.07 km) |
| San Marcos to Clarkston (Georgia) | 1,890.53 mi (3,042.52 km) |
| San Marcos to Clarksville (Indiana) | 1,788.66 mi (2,878.58 km) |
| San Marcos to Clarksville (Tennessee) | 1,701.19 mi (2,737.80 km) |
| San Marcos to Clawson (Michigan) | 1,951.51 mi (3,140.65 km) |
| San Marcos to Clay (Alabama) | 1,756.72 mi (2,827.17 km) |
| San Marcos to Clayton (California) | 426.16 mi (685.84 km) |
| San Marcos to Clayton (Missouri) | 1,543.99 mi (2,484.81 km) |
| San Marcos to Clayton (North Carolina) | 2,200.43 mi (3,541.25 km) |
| San Marcos to Clayton (Ohio) | 1,871.16 mi (3,011.34 km) |
| San Marcos to Clearfield (Utah) | 619.06 mi (996.28 km) |
| San Marcos to Clearlake (California) | 504.66 mi (812.17 km) |
| San Marcos to Clearwater (Florida) | 2,068.76 mi (3,329.34 km) |
| San Marcos to Cleburne (Texas) | 1,147.83 mi (1,847.25 km) |
| San Marcos to Clemmons (North Carolina) | 2,089.85 mi (3,363.29 km) |
