| Castro Valley to Klaukkala | 5,402.99 mi (8,695.28 km) |
| Castro Valley to Kokkola | 5,166.70 mi (8,315.00 km) |
| Castro Valley to Kontiolahti | 5,322.21 mi (8,565.28 km) |
| Castro Valley to Korsholm | 5,189.32 mi (8,351.40 km) |
| Castro Valley to Kotka | 5,429.79 mi (8,738.40 km) |
| Castro Valley to Kouvola | 5,401.23 mi (8,692.44 km) |
| Castro Valley to Kuhmo | 5,231.65 mi (8,419.52 km) |
| Castro Valley to Kuopio | 5,287.09 mi (8,508.75 km) |
| Castro Valley to Kurikka | 5,230.29 mi (8,417.34 km) |
| Castro Valley to Kuusamo | 5,110.78 mi (8,225.01 km) |
| Castro Valley to Kuusankoski | 5,397.57 mi (8,686.55 km) |
| Castro Valley to Lahti | 5,378.96 mi (8,656.60 km) |
| Castro Valley to Laitila | 5,324.62 mi (8,569.15 km) |
| Castro Valley to Lapinlahti | 5,253.44 mi (8,454.60 km) |
| Castro Valley to Lappeenranta | 5,409.05 mi (8,705.03 km) |
