| Forest Grove to Clarksdale (Mississippi) | 1,878.32 mi (3,022.87 km) |
| Forest Grove to Clarkston (Georgia) | 2,194.21 mi (3,531.24 km) |
| Forest Grove to Clarksville (Indiana) | 1,963.95 mi (3,160.67 km) |
| Forest Grove to Clarksville (Tennessee) | 1,945.27 mi (3,130.61 km) |
| Forest Grove to Clawson (Michigan) | 1,975.10 mi (3,178.62 km) |
| Forest Grove to Clay (Alabama) | 2,085.43 mi (3,356.17 km) |
| Forest Grove to Clayton (California) | 527.50 mi (848.93 km) |
| Forest Grove to Clayton (Missouri) | 1,733.35 mi (2,789.56 km) |
| Forest Grove to Clayton (North Carolina) | 2,406.40 mi (3,872.72 km) |
| Forest Grove to Clayton (Ohio) | 1,987.54 mi (3,198.64 km) |
| Forest Grove to Clearfield (Utah) | 634.75 mi (1,021.53 km) |
| Forest Grove to Clearlake (California) | 454.28 mi (731.09 km) |
| Forest Grove to Clearwater (Florida) | 2,505.56 mi (4,032.31 km) |
| Forest Grove to Cleburne (Texas) | 1,642.19 mi (2,642.84 km) |
| Forest Grove to Clemmons (North Carolina) | 2,299.71 mi (3,701.03 km) |
