| San Marcos to San Clemente (California) | 33.27 mi (53.55 km) |
| San Marcos to San Diego (California) | 21.20 mi (34.12 km) |
| San Marcos to San Diego Country Estates (California) | 24.02 mi (38.66 km) |
| San Marcos to San Dimas (California) | 76.52 mi (123.14 km) |
| San Marcos to San Fernando (California) | 107.76 mi (173.43 km) |
| San Marcos to San Francisco (California) | 435.67 mi (701.14 km) |
| San Marcos to San Gabriel (California) | 85.03 mi (136.84 km) |
| San Marcos to San Germán (Puerto Rico) | 3,258.34 mi (5,243.79 km) |
| San Marcos to San Jacinto (California) | 46.94 mi (75.54 km) |
| San Marcos to San Jose (California) | 390.35 mi (628.20 km) |
| San Marcos to San Juan (Puerto Rico) | 3,304.65 mi (5,318.32 km) |
| San Marcos to San Juan (Texas) | 1,236.31 mi (1,989.65 km) |
| San Marcos to San Juan Capistrano (California) | 37.51 mi (60.37 km) |
| San Marcos to San Leandro (California) | 422.48 mi (679.91 km) |
| San Marcos to San Lorenzo (California) | 419.76 mi (675.53 km) |
