| Mount Washington to Cascais | 3,995.08 mi (6,429.46 km) |
| Mount Washington to Castelo Branco | 4,054.44 mi (6,525.00 km) |
| Mount Washington to Castro Daire | 4,001.94 mi (6,440.50 km) |
| Mount Washington to Celorico de Basto | 3,984.87 mi (6,413.03 km) |
| Mount Washington to Chamusca | 4,021.07 mi (6,471.29 km) |
| Mount Washington to Chaves | 3,999.50 mi (6,436.57 km) |
| Mount Washington to Cinfaes | 3,986.70 mi (6,415.97 km) |
| Mount Washington to Coimbra | 3,998.35 mi (6,434.72 km) |
| Mount Washington to Condeixa-a-Nova | 3,997.71 mi (6,433.69 km) |
| Mount Washington to Corroios | 4,010.57 mi (6,454.38 km) |
| Mount Washington to Coruche | 4,030.66 mi (6,486.73 km) |
| Mount Washington to Costa de Caparica | 4,005.55 mi (6,446.31 km) |
| Mount Washington to Covilha | 4,040.58 mi (6,502.69 km) |
| Mount Washington to Eiras | 3,997.69 mi (6,433.66 km) |
| Mount Washington to Elvas | 4,099.96 mi (6,598.24 km) |
