| San Marcos to Mankato (Minnesota) | 1,457.92 mi (2,346.30 km) |
| San Marcos to Manor (Texas) | 1,168.71 mi (1,880.86 km) |
| San Marcos to Manorville (New York) | 2,479.21 mi (3,989.90 km) |
| San Marcos to Mansfield (Ohio) | 1,970.30 mi (3,170.90 km) |
| San Marcos to Mansfield (Texas) | 1,162.83 mi (1,871.40 km) |
| San Marcos to Manteca (California) | 394.32 mi (634.59 km) |
| San Marcos to Manville (New Jersey) | 2,385.78 mi (3,839.53 km) |
| San Marcos to Maple Grove (Minnesota) | 1,507.67 mi (2,426.37 km) |
| San Marcos to Maple Heights (Ohio) | 2,023.91 mi (3,257.16 km) |
| San Marcos to Maple Valley (Washington) | 1,015.61 mi (1,634.47 km) |
| San Marcos to Mapleton (Utah) | 573.52 mi (922.98 km) |
| San Marcos to Maplewood (Minnesota) | 1,523.52 mi (2,451.88 km) |
| San Marcos to Marana (Arizona) | 352.87 mi (567.89 km) |
| San Marcos to Marco Island (Florida) | 2,178.88 mi (3,506.57 km) |
| San Marcos to Margate (Florida) | 2,256.91 mi (3,632.15 km) |
