| San Marcos to Grand Junction (Colorado) | 631.89 mi (1,016.93 km) |
| San Marcos to Grand Prairie (Texas) | 1,167.61 mi (1,879.09 km) |
| San Marcos to Grand Rapids (Michigan) | 1,831.06 mi (2,946.81 km) |
| San Marcos to Grand Rapids (Minnesota) | 1,572.47 mi (2,530.65 km) |
| San Marcos to Grand Terrace (California) | 62.44 mi (100.48 km) |
| San Marcos to Grandview (Missouri) | 1,322.76 mi (2,128.78 km) |
| San Marcos to Grandview (Washington) | 917.21 mi (1,476.10 km) |
| San Marcos to Grandville (Michigan) | 1,825.27 mi (2,937.49 km) |
| San Marcos to Granger (Indiana) | 1,792.05 mi (2,884.03 km) |
| San Marcos to Granite Bay (California) | 448.25 mi (721.39 km) |
| San Marcos to Granite City (Illinois) | 1,555.52 mi (2,503.37 km) |
| San Marcos to Grants Pass (Oregon) | 724.61 mi (1,166.14 km) |
| San Marcos to Grantsville (Utah) | 578.10 mi (930.36 km) |
| San Marcos to Grapevine (Texas) | 1,162.57 mi (1,870.97 km) |
| San Marcos to Grass Valley (California) | 472.90 mi (761.06 km) |
