| Castle Rock to Port Chester (New York) | 1,641.08 mi (2,641.06 km) |
| Castle Rock to Port Hueneme (California) | 870.79 mi (1,401.40 km) |
| Castle Rock to Port Huron (Michigan) | 1,188.17 mi (1,912.17 km) |
| Castle Rock to Port Lavaca (Texas) | 879.14 mi (1,414.83 km) |
| Castle Rock to Port Neches (Texas) | 896.35 mi (1,442.54 km) |
| Castle Rock to Port Orange (Florida) | 1,528.71 mi (2,460.22 km) |
| Castle Rock to Port Orchard (Washington) | 1,051.79 mi (1,692.69 km) |
| Castle Rock to Port Royal (South Carolina) | 1,431.30 mi (2,303.45 km) |
| Castle Rock to Port Salerno (Florida) | 1,648.42 mi (2,652.87 km) |
| Castle Rock to Port St. John (Florida) | 1,563.62 mi (2,516.41 km) |
| Castle Rock to Port St. Lucie (Florida) | 1,633.10 mi (2,628.22 km) |
| Castle Rock to Port Washington (New York) | 1,642.05 mi (2,642.62 km) |
| Castle Rock to Port Washington (Wisconsin) | 920.33 mi (1,481.12 km) |
| Castle Rock to Port Wentworth (Georgia) | 1,410.47 mi (2,269.94 km) |
| Castle Rock to Portage (Indiana) | 939.57 mi (1,512.09 km) |
