| San Marcos to Clemson (South Carolina) | 1,963.75 mi (3,160.34 km) |
| San Marcos to Clermont (Florida) | 2,117.15 mi (3,407.22 km) |
| San Marcos to Cleveland (Mississippi) | 1,521.16 mi (2,448.07 km) |
| San Marcos to Cleveland (Ohio) | 2,018.21 mi (3,247.99 km) |
| San Marcos to Cleveland (Tennessee) | 1,844.25 mi (2,968.03 km) |
| San Marcos to Cleveland Heights (Ohio) | 2,024.44 mi (3,258.02 km) |
| San Marcos to Cliffside Park (New Jersey) | 2,416.78 mi (3,889.43 km) |
| San Marcos to Clifton (Colorado) | 635.94 mi (1,023.45 km) |
| San Marcos to Clifton (New Jersey) | 2,407.85 mi (3,875.05 km) |
| San Marcos to Clinton (Iowa) | 1,586.06 mi (2,552.52 km) |
| San Marcos to Clinton (Maryland) | 2,267.15 mi (3,648.62 km) |
| San Marcos to Clinton (Mississippi) | 1,556.10 mi (2,504.30 km) |
| San Marcos to Clinton (Utah) | 620.23 mi (998.16 km) |
| San Marcos to Clive (Iowa) | 1,404.96 mi (2,261.07 km) |
| San Marcos to Cloquet (Minnesota) | 1,598.62 mi (2,572.72 km) |
