| Castro Valley to Butzbach | 5,651.23 mi (9,094.78 km) |
| Castro Valley to Buxtehude | 5,510.27 mi (8,867.92 km) |
| Castro Valley to Cadolzburg | 5,764.32 mi (9,276.77 km) |
| Castro Valley to Calbe | 5,649.29 mi (9,091.65 km) |
| Castro Valley to Calw | 5,747.83 mi (9,250.24 km) |
| Castro Valley to Castrop-Rauxel | 5,554.59 mi (8,939.25 km) |
| Castro Valley to Celle | 5,566.91 mi (8,959.07 km) |
| Castro Valley to Cham | 5,823.61 mi (9,372.19 km) |
| Castro Valley to Chemnitz | 5,738.08 mi (9,234.55 km) |
| Castro Valley to Clausthal-Zellerfeld | 5,618.92 mi (9,042.78 km) |
| Castro Valley to Cloppenburg | 5,503.13 mi (8,856.43 km) |
| Castro Valley to Coburg | 5,721.07 mi (9,207.17 km) |
| Castro Valley to Coesfeld | 5,528.95 mi (8,897.98 km) |
| Castro Valley to Cologne | 5,578.02 mi (8,976.96 km) |
| Castro Valley to Coswig | 5,737.17 mi (9,233.08 km) |
