| San Marcos to Morris (Illinois) | 1,670.83 mi (2,688.94 km) |
| San Marcos to Morristown (New Jersey) | 2,391.24 mi (3,848.32 km) |
| San Marcos to Morristown (Tennessee) | 1,926.78 mi (3,100.85 km) |
| San Marcos to Morrisville (North Carolina) | 2,177.56 mi (3,504.45 km) |
| San Marcos to Morro Bay (California) | 260.41 mi (419.09 km) |
| San Marcos to Morton (Illinois) | 1,608.30 mi (2,588.31 km) |
| San Marcos to Morton Grove (Illinois) | 1,712.09 mi (2,755.34 km) |
| San Marcos to Moscow (Idaho) | 939.42 mi (1,511.86 km) |
| San Marcos to Moses Lake (Washington) | 973.07 mi (1,566.00 km) |
| San Marcos to Moss Bluff (Louisiana) | 1,419.11 mi (2,283.83 km) |
| San Marcos to Moss Point (Mississippi) | 1,687.63 mi (2,715.97 km) |
| San Marcos to Moultrie (Georgia) | 1,950.66 mi (3,139.29 km) |
| San Marcos to Mounds View (Minnesota) | 1,518.90 mi (2,444.44 km) |
| San Marcos to Mount Airy (North Carolina) | 2,074.27 mi (3,338.22 km) |
| San Marcos to Mount Clemens (Michigan) | 1,965.62 mi (3,163.35 km) |
