| San Marcos to Fortuna (California) | 642.48 mi (1,033.97 km) |
| San Marcos to Fortuna Foothills (Arizona) | 164.38 mi (264.54 km) |
| San Marcos to Foster City (California) | 418.93 mi (674.20 km) |
| San Marcos to Fostoria (Ohio) | 1,926.71 mi (3,100.73 km) |
| San Marcos to Fountain (Colorado) | 796.38 mi (1,281.64 km) |
| San Marcos to Fountain Hills (Arizona) | 315.23 mi (507.32 km) |
| San Marcos to Fountain Inn (South Carolina) | 1,998.13 mi (3,215.68 km) |
| San Marcos to Fountain Valley (California) | 59.91 mi (96.42 km) |
| San Marcos to Fountainebleau (Florida) | 2,261.15 mi (3,638.97 km) |
| San Marcos to Four Corners (Oregon) | 871.70 mi (1,402.86 km) |
| San Marcos to Four Corners (Texas) | 1,288.76 mi (2,074.05 km) |
| San Marcos to Four Square Mile (Colorado) | 818.14 mi (1,316.67 km) |
| San Marcos to Fox Crossing (Wisconsin) | 1,715.01 mi (2,760.03 km) |
| San Marcos to Fox Lake (Illinois) | 1,697.78 mi (2,732.31 km) |
| San Marcos to Framingham (Massachusetts) | 2,546.43 mi (4,098.08 km) |
