| Boulder to San Lorenzo de Descardazar | 5,330.33 mi (8,578.34 km) |
| Boulder to San Lorenzo de El Escorial | 4,985.49 mi (8,023.37 km) |
| Boulder to San Martin de la Vega | 5,025.50 mi (8,087.75 km) |
| Boulder to San Martin de Valdeiglesias | 4,984.51 mi (8,021.79 km) |
| Boulder to San Pedro de Ribas | 5,195.32 mi (8,361.06 km) |
| Boulder to San Roque | 5,119.53 mi (8,239.09 km) |
| Boulder to San Sebastian de la Gomera | 4,909.10 mi (7,900.43 km) |
| Boulder to San Sebastian de los Reyes | 5,008.86 mi (8,060.98 km) |
| Boulder to San Vicente de Baracaldo | 4,917.69 mi (7,914.25 km) |
| Boulder to San Vicente de Castellet | 5,180.57 mi (8,337.32 km) |
| Boulder to San Vicente del Raspeig | 5,230.88 mi (8,418.29 km) |
| Boulder to San Vicente dels Horts | 5,198.56 mi (8,366.28 km) |
| Boulder to Sangenjo | 4,717.18 mi (7,591.57 km) |
| Boulder to Sanlucar de Barrameda | 5,053.57 mi (8,132.94 km) |
| Boulder to Sanlucar la Mayor | 5,034.05 mi (8,101.52 km) |
