| Upper Grand Lagoon to Cocentaina | 4,718.95 mi (7,594.42 km) |
| Upper Grand Lagoon to Coin | 4,551.66 mi (7,325.18 km) |
| Upper Grand Lagoon to Colindres | 4,460.83 mi (7,179.01 km) |
| Upper Grand Lagoon to Collado-Villalba | 4,495.45 mi (7,234.72 km) |
| Upper Grand Lagoon to Colmenar Viejo | 4,506.85 mi (7,253.08 km) |
| Upper Grand Lagoon to Colmenarejo | 4,496.68 mi (7,236.71 km) |
| Upper Grand Lagoon to Conil de la Frontera | 4,491.90 mi (7,229.01 km) |
| Upper Grand Lagoon to Consuegra | 4,542.75 mi (7,310.86 km) |
| Upper Grand Lagoon to Corbera de Llobregat | 4,765.65 mi (7,669.57 km) |
| Upper Grand Lagoon to Cordoba | 4,520.78 mi (7,275.50 km) |
| Upper Grand Lagoon to Coria del Rio | 4,469.59 mi (7,193.11 km) |
| Upper Grand Lagoon to Crevillente | 4,713.32 mi (7,585.35 km) |
| Upper Grand Lagoon to Cuarte de Huerva | 4,624.27 mi (7,442.05 km) |
| Upper Grand Lagoon to Cubellas | 4,758.67 mi (7,658.35 km) |
| Upper Grand Lagoon to Cuellar | 4,463.06 mi (7,182.60 km) |
