| San Marcos to Shelton (Connecticut) | 2,460.22 mi (3,959.34 km) |
| San Marcos to Shelton (Washington) | 1,021.54 mi (1,644.02 km) |
| San Marcos to Shenandoah (Louisiana) | 1,544.92 mi (2,486.31 km) |
| San Marcos to Shepherdsville (Kentucky) | 1,791.66 mi (2,883.40 km) |
| San Marcos to Sheridan (Wyoming) | 972.94 mi (1,565.80 km) |
| San Marcos to Sherman (Texas) | 1,184.30 mi (1,905.94 km) |
| San Marcos to Sherrelwood (Colorado) | 818.43 mi (1,317.13 km) |
| San Marcos to Sherwood (Arkansas) | 1,431.71 mi (2,304.12 km) |
| San Marcos to Sherwood (Oregon) | 896.83 mi (1,443.31 km) |
| San Marcos to Shiloh (Illinois) | 1,565.62 mi (2,519.62 km) |
| San Marcos to Shiloh (Ohio) | 1,876.07 mi (3,019.25 km) |
| San Marcos to Shiloh (Pennsylvania) | 2,270.49 mi (3,654.00 km) |
| San Marcos to Shirley (New York) | 2,475.02 mi (3,983.16 km) |
| San Marcos to Shively (Kentucky) | 1,785.89 mi (2,874.11 km) |
| San Marcos to Shoreline (Washington) | 1,045.53 mi (1,682.62 km) |
