| Clay to Cascais | 4,187.49 mi (6,739.11 km) |
| Clay to Castelo Branco | 4,254.53 mi (6,847.00 km) |
| Clay to Castro Daire | 4,206.04 mi (6,768.97 km) |
| Clay to Celorico de Basto | 4,190.94 mi (6,744.66 km) |
| Clay to Chamusca | 4,217.71 mi (6,787.75 km) |
| Clay to Chaves | 4,207.77 mi (6,771.75 km) |
| Clay to Cinfaes | 4,191.38 mi (6,745.37 km) |
| Clay to Coimbra | 4,198.80 mi (6,757.32 km) |
| Clay to Condeixa-a-Nova | 4,197.66 mi (6,755.48 km) |
| Clay to Corroios | 4,202.99 mi (6,764.07 km) |
| Clay to Coruche | 4,225.53 mi (6,800.33 km) |
| Clay to Costa de Caparica | 4,197.98 mi (6,755.99 km) |
| Clay to Covilha | 4,242.66 mi (6,827.90 km) |
| Clay to Eiras | 4,198.29 mi (6,756.50 km) |
| Clay to Elvas | 4,296.49 mi (6,914.54 km) |
