| Castro Valley to Cividale del Friuli | 6,022.43 mi (9,692.16 km) |
| Castro Valley to Civita Castellana | 6,211.83 mi (9,996.98 km) |
| Castro Valley to Civitanova Marche | 6,191.72 mi (9,964.61 km) |
| Castro Valley to Civitavecchia | 6,205.27 mi (9,986.42 km) |
| Castro Valley to Civitella in Val di Chiana | 6,128.17 mi (9,862.33 km) |
| Castro Valley to Clusone | 5,938.99 mi (9,557.88 km) |
| Castro Valley to Coccaglio | 5,957.66 mi (9,587.93 km) |
| Castro Valley to Codigoro | 6,059.02 mi (9,751.04 km) |
| Castro Valley to Codogno | 5,972.33 mi (9,611.54 km) |
| Castro Valley to Codroipo | 6,018.17 mi (9,685.31 km) |
| Castro Valley to Cogoleto | 5,984.13 mi (9,630.52 km) |
| Castro Valley to Colle di Val d'Elsa | 6,112.30 mi (9,836.79 km) |
| Castro Valley to Colle Salvetti | 6,082.14 mi (9,788.26 km) |
| Castro Valley to Collecchio | 6,009.96 mi (9,672.09 km) |
| Castro Valley to Colleferro | 6,261.50 mi (10,076.91 km) |
