| Canals to Ridgeland (Mississippi) | 4,835.99 mi (7,782.78 km) |
| Canals to Ridgewood (New Jersey) | 3,774.72 mi (6,074.83 km) |
| Canals to Rifle (Colorado) | 5,327.87 mi (8,574.38 km) |
| Canals to Rincon (Georgia) | 4,402.75 mi (7,085.53 km) |
| Canals to Ringwood (New Jersey) | 3,778.97 mi (6,081.67 km) |
| Canals to Río Grande (Puerto Rico) | 4,112.85 mi (6,618.99 km) |
| Canals to Rio Grande City (Texas) | 5,503.52 mi (8,857.07 km) |
| Canals to Rio Linda (California) | 5,894.44 mi (9,486.18 km) |
| Canals to Rio Rancho (New Mexico) | 5,473.38 mi (8,808.56 km) |
| Canals to Rio Rico (Arizona) | 5,832.38 mi (9,386.31 km) |
| Canals to Ripon (California) | 5,931.61 mi (9,546.00 km) |
| Canals to River Edge (New Jersey) | 3,772.74 mi (6,071.63 km) |
| Canals to River Falls (Wisconsin) | 4,485.35 mi (7,218.47 km) |
| Canals to River Forest (Illinois) | 4,380.27 mi (7,049.36 km) |
| Canals to River Grove (Illinois) | 4,380.09 mi (7,049.08 km) |
