| San Marcos to Bixby (Oklahoma) | 1,225.01 mi (1,971.47 km) |
| San Marcos to Black Forest (Colorado) | 807.94 mi (1,300.25 km) |
| San Marcos to Blackfoot (Idaho) | 742.52 mi (1,194.97 km) |
| San Marcos to Blackhawk (California) | 418.81 mi (674.01 km) |
| San Marcos to Blacksburg (Virginia) | 2,081.21 mi (3,349.39 km) |
| San Marcos to Blackwells Mills (New Jersey) | 2,385.45 mi (3,839.02 km) |
| San Marcos to Blaine (Minnesota) | 1,520.71 mi (2,447.34 km) |
| San Marcos to Bloomingdale (Florida) | 2,099.89 mi (3,379.45 km) |
| San Marcos to Bloomingdale (Illinois) | 1,695.70 mi (2,728.96 km) |
| San Marcos to Bloomington (California) | 65.24 mi (104.99 km) |
| San Marcos to Bloomington (Illinois) | 1,632.46 mi (2,627.18 km) |
| San Marcos to Bloomington (Indiana) | 1,750.92 mi (2,817.83 km) |
| San Marcos to Bloomington (Minnesota) | 1,506.21 mi (2,424.02 km) |
| San Marcos to Bloomsburg (Pennsylvania) | 2,287.80 mi (3,681.85 km) |
| San Marcos to Blue Ash (Ohio) | 1,865.79 mi (3,002.70 km) |
