| Forest Grove to Ridgeland (Mississippi) | 1,969.46 mi (3,169.54 km) |
| Forest Grove to Ridgewood (New Jersey) | 2,446.98 mi (3,938.03 km) |
| Forest Grove to Rifle (Colorado) | 881.67 mi (1,418.92 km) |
| Forest Grove to Rincon (Georgia) | 2,397.07 mi (3,857.72 km) |
| Forest Grove to Ringwood (New Jersey) | 2,435.76 mi (3,919.97 km) |
| Forest Grove to Río Grande (Puerto Rico) | 3,747.31 mi (6,030.71 km) |
| Forest Grove to Rio Grande City (Texas) | 1,881.68 mi (3,028.27 km) |
| Forest Grove to Rio Linda (California) | 480.02 mi (772.52 km) |
| Forest Grove to Rio Rancho (New Mexico) | 1,112.38 mi (1,790.19 km) |
| Forest Grove to Rio Rico (Arizona) | 1,167.09 mi (1,878.26 km) |
| Forest Grove to Ripon (California) | 547.30 mi (880.79 km) |
| Forest Grove to River Edge (New Jersey) | 2,452.06 mi (3,946.22 km) |
| Forest Grove to River Falls (Wisconsin) | 1,476.13 mi (2,375.60 km) |
| Forest Grove to River Forest (Illinois) | 1,765.79 mi (2,841.77 km) |
| Forest Grove to River Grove (Illinois) | 1,764.20 mi (2,839.21 km) |
