| Boulder City to Butzbach | 5,559.15 mi (8,946.59 km) |
| Boulder City to Buxtehude | 5,435.81 mi (8,748.09 km) |
| Boulder City to Cadolzburg | 5,675.58 mi (9,133.97 km) |
| Boulder City to Calbe | 5,574.73 mi (8,971.66 km) |
| Boulder City to Calw | 5,648.10 mi (9,089.74 km) |
| Boulder City to Castrop-Rauxel | 5,463.12 mi (8,792.05 km) |
| Boulder City to Celle | 5,489.79 mi (8,834.96 km) |
| Boulder City to Cham | 5,740.39 mi (9,238.26 km) |
| Boulder City to Chemnitz | 5,662.86 mi (9,113.50 km) |
| Boulder City to Clausthal-Zellerfeld | 5,538.91 mi (8,914.02 km) |
| Boulder City to Cloppenburg | 5,420.27 mi (8,723.08 km) |
| Boulder City to Coburg | 5,636.34 mi (9,070.81 km) |
| Boulder City to Coesfeld | 5,438.88 mi (8,753.04 km) |
| Boulder City to Cologne | 5,482.42 mi (8,823.10 km) |
| Boulder City to Coswig | 5,665.66 mi (9,117.99 km) |
