| Castle Rock to Cascais | 4,847.13 mi (7,800.71 km) |
| Castle Rock to Castelo Branco | 4,886.04 mi (7,863.32 km) |
| Castle Rock to Castro Daire | 4,824.06 mi (7,763.58 km) |
| Castle Rock to Celorico de Basto | 4,802.04 mi (7,728.13 km) |
| Castle Rock to Chamusca | 4,862.16 mi (7,824.88 km) |
| Castle Rock to Chaves | 4,810.23 mi (7,741.31 km) |
| Castle Rock to Cinfaes | 4,807.59 mi (7,737.07 km) |
| Castle Rock to Coimbra | 4,830.17 mi (7,773.41 km) |
| Castle Rock to Condeixa-a-Nova | 4,830.87 mi (7,774.53 km) |
| Castle Rock to Corroios | 4,862.26 mi (7,825.04 km) |
| Castle Rock to Coruche | 4,875.98 mi (7,847.14 km) |
| Castle Rock to Costa de Caparica | 4,857.32 mi (7,817.11 km) |
| Castle Rock to Covilha | 4,867.26 mi (7,833.10 km) |
| Castle Rock to Eiras | 4,829.17 mi (7,771.79 km) |
| Castle Rock to Elvas | 4,939.68 mi (7,949.65 km) |
