| San Marcos to Badger (Alaska) | 2,529.63 mi (4,071.05 km) |
| San Marcos to Bailey's Crossroads (Virginia) | 2,254.78 mi (3,628.71 km) |
| San Marcos to Bainbridge (Georgia) | 1,908.38 mi (3,071.25 km) |
| San Marcos to Bainbridge Island (Washington) | 1,040.86 mi (1,675.11 km) |
| San Marcos to Baker (Louisiana) | 1,532.93 mi (2,467.01 km) |
| San Marcos to Bakersfield (California) | 186.51 mi (300.15 km) |
| San Marcos to Balch Springs (Texas) | 1,190.75 mi (1,916.33 km) |
| San Marcos to Baldwin (New York) | 2,437.03 mi (3,922.02 km) |
| San Marcos to Baldwin (Pennsylvania) | 2,103.06 mi (3,384.55 km) |
| San Marcos to Baldwin Park (California) | 79.98 mi (128.72 km) |
| San Marcos to Ballenger Creek (Maryland) | 2,237.95 mi (3,601.63 km) |
| San Marcos to Ballwin (Missouri) | 1,531.84 mi (2,465.25 km) |
| San Marcos to Baltimore (Maryland) | 2,281.17 mi (3,671.18 km) |
| San Marcos to Bangor (Maine) | 2,678.02 mi (4,309.86 km) |
| San Marcos to Banning (California) | 58.23 mi (93.71 km) |
