| San Marcos to Portage (Indiana) | 1,737.13 mi (2,795.63 km) |
| San Marcos to Portage (Michigan) | 1,824.85 mi (2,936.82 km) |
| San Marcos to Portage (Wisconsin) | 1,654.51 mi (2,662.68 km) |
| San Marcos to Portales (New Mexico) | 797.32 mi (1,283.17 km) |
| San Marcos to Porterville (California) | 228.35 mi (367.49 km) |
| San Marcos to Portland (Maine) | 2,604.46 mi (4,191.47 km) |
| San Marcos to Portland (Oregon) | 904.91 mi (1,456.32 km) |
| San Marcos to Portland (Tennessee) | 1,746.50 mi (2,810.72 km) |
| San Marcos to Portland (Texas) | 1,233.32 mi (1,984.83 km) |
| San Marcos to Portsmouth (New Hampshire) | 2,578.97 mi (4,150.45 km) |
| San Marcos to Portsmouth (Ohio) | 1,941.89 mi (3,125.17 km) |
| San Marcos to Portsmouth (Virginia) | 2,307.29 mi (3,713.23 km) |
| San Marcos to Post Falls (Idaho) | 1,007.89 mi (1,622.04 km) |
| San Marcos to Potomac (Maryland) | 2,250.88 mi (3,622.44 km) |
| San Marcos to Potomac Park (California) | 184.84 mi (297.47 km) |
