| Boulder to Cuenca | 5,090.34 mi (8,192.11 km) |
| Boulder to Cuevas del Almanzora | 5,223.40 mi (8,406.26 km) |
| Boulder to Cullera | 5,207.95 mi (8,381.39 km) |
| Boulder to Culleredo | 4,699.40 mi (7,562.96 km) |
| Boulder to Cunit | 5,192.64 mi (8,356.75 km) |
| Boulder to Daganzo de Arriba | 5,015.97 mi (8,072.42 km) |
| Boulder to Daimiel | 5,071.94 mi (8,162.50 km) |
| Boulder to Don Benito | 4,982.42 mi (8,018.43 km) |
| Boulder to Donostia | 4,956.78 mi (7,977.17 km) |
| Boulder to Dos Hermanas | 5,050.33 mi (8,127.71 km) |
| Boulder to Durango | 4,937.50 mi (7,946.14 km) |
| Boulder to Ecija | 5,075.99 mi (8,169.01 km) |
| Boulder to Ejea de los Caballeros | 5,041.59 mi (8,113.66 km) |
| Boulder to El Alamo | 5,007.07 mi (8,058.11 km) |
| Boulder to El Arahal | 5,067.19 mi (8,154.85 km) |
