| Walnut Creek to Ridgefield Park (New Jersey) | 2,540.53 mi (4,088.59 km) |
| Walnut Creek to Ridgeland (Mississippi) | 1,831.37 mi (2,947.30 km) |
| Walnut Creek to Ridgewood (New Jersey) | 2,534.05 mi (4,078.16 km) |
| Walnut Creek to Rifle (Colorado) | 776.50 mi (1,249.65 km) |
| Walnut Creek to Rincon (Georgia) | 2,320.29 mi (3,734.15 km) |
| Walnut Creek to Ringwood (New Jersey) | 2,524.09 mi (4,062.13 km) |
| Walnut Creek to Río Grande (Puerto Rico) | 3,620.00 mi (5,825.83 km) |
| Walnut Creek to Rio Grande City (Texas) | 1,567.80 mi (2,523.14 km) |
| Walnut Creek to Rio Linda (California) | 63.20 mi (101.72 km) |
| Walnut Creek to Rio Rancho (New Mexico) | 868.94 mi (1,398.42 km) |
| Walnut Creek to Rio Rico (Arizona) | 767.24 mi (1,234.75 km) |
| Walnut Creek to Ripon (California) | 50.83 mi (81.81 km) |
| Walnut Creek to River Edge (New Jersey) | 2,538.59 mi (4,085.46 km) |
| Walnut Creek to River Falls (Wisconsin) | 1,588.88 mi (2,557.06 km) |
| Walnut Creek to River Forest (Illinois) | 1,822.47 mi (2,932.98 km) |
