| Martha Lake to Cocentaina | 5,468.76 mi (8,801.13 km) |
| Martha Lake to Coin | 5,444.30 mi (8,761.76 km) |
| Martha Lake to Colindres | 5,117.38 mi (8,235.63 km) |
| Martha Lake to Collado-Villalba | 5,251.06 mi (8,450.76 km) |
| Martha Lake to Colmenar Viejo | 5,257.39 mi (8,460.95 km) |
| Martha Lake to Colmenarejo | 5,254.75 mi (8,456.71 km) |
| Martha Lake to Conil de la Frontera | 5,420.93 mi (8,724.14 km) |
| Martha Lake to Consuegra | 5,328.29 mi (8,575.05 km) |
| Martha Lake to Corbera de Llobregat | 5,389.65 mi (8,673.80 km) |
| Martha Lake to Cordoba | 5,376.52 mi (8,652.67 km) |
| Martha Lake to Coria del Rio | 5,366.71 mi (8,636.88 km) |
| Martha Lake to Crevillente | 5,485.08 mi (8,827.38 km) |
| Martha Lake to Cuarte de Huerva | 5,295.01 mi (8,521.49 km) |
| Martha Lake to Cubellas | 5,393.81 mi (8,680.49 km) |
| Martha Lake to Cuellar | 5,199.35 mi (8,367.55 km) |
