| Castro Valley to Ratingen | 5,555.60 mi (8,940.88 km) |
| Castro Valley to Ratzeburg | 5,523.45 mi (8,889.13 km) |
| Castro Valley to Raubling | 5,890.74 mi (9,480.23 km) |
| Castro Valley to Rauenberg | 5,716.66 mi (9,200.08 km) |
| Castro Valley to Raunheim | 5,668.62 mi (9,122.75 km) |
| Castro Valley to Ravensburg | 5,823.69 mi (9,372.32 km) |
| Castro Valley to Recke | 5,520.69 mi (8,884.69 km) |
| Castro Valley to Recklinghausen | 5,548.57 mi (8,929.56 km) |
| Castro Valley to Regen | 5,850.19 mi (9,414.97 km) |
| Castro Valley to Regensburg | 5,820.43 mi (9,367.08 km) |
| Castro Valley to Regenstauf | 5,815.53 mi (9,359.19 km) |
| Castro Valley to Rehau | 5,748.80 mi (9,251.80 km) |
| Castro Valley to Rehburg-Loccum | 5,554.57 mi (8,939.21 km) |
| Castro Valley to Rehlingen-Siersburg | 5,655.19 mi (9,101.14 km) |
| Castro Valley to Reichelsheim | 5,695.72 mi (9,166.37 km) |
