| San Marcos to Cold Springs (Nevada) | 479.08 mi (771.00 km) |
| San Marcos to Coldwater (Michigan) | 1,852.05 mi (2,980.59 km) |
| San Marcos to Colesville (Maryland) | 2,261.08 mi (3,638.86 km) |
| San Marcos to College (Alaska) | 2,542.03 mi (4,091.00 km) |
| San Marcos to College Park (Georgia) | 1,879.50 mi (3,024.76 km) |
| San Marcos to College Park (Maryland) | 2,264.91 mi (3,645.02 km) |
| San Marcos to College Station (Texas) | 1,235.72 mi (1,988.70 km) |
| San Marcos to Collegedale (Tennessee) | 1,835.01 mi (2,953.16 km) |
| San Marcos to Colleyville (Texas) | 1,158.60 mi (1,864.59 km) |
| San Marcos to Collierville (Tennessee) | 1,572.72 mi (2,531.05 km) |
| San Marcos to Collinsville (Illinois) | 1,561.61 mi (2,513.17 km) |
| San Marcos to Colonia (New Jersey) | 2,400.08 mi (3,862.55 km) |
| San Marcos to Colonial Heights (Virginia) | 2,247.32 mi (3,616.71 km) |
| San Marcos to Colonial Park (Pennsylvania) | 2,269.42 mi (3,652.28 km) |
| San Marcos to Colorado Springs (Colorado) | 797.91 mi (1,284.12 km) |
