| Castle Rock to Yonkers (New York) | 1,631.20 mi (2,625.16 km) |
| Castle Rock to Yorba Linda (California) | 809.28 mi (1,302.41 km) |
| Castle Rock to York (Pennsylvania) | 1,489.95 mi (2,397.84 km) |
| Castle Rock to Yorktown (Indiana) | 1,026.48 mi (1,651.96 km) |
| Castle Rock to Yorkville (Illinois) | 874.45 mi (1,407.30 km) |
| Castle Rock to Youngstown (Ohio) | 1,278.18 mi (2,057.04 km) |
| Castle Rock to Youngsville (Louisiana) | 969.76 mi (1,560.68 km) |
| Castle Rock to Ypsilanti (Michigan) | 1,124.85 mi (1,810.27 km) |
| Castle Rock to Yuba City (California) | 896.86 mi (1,443.36 km) |
| Castle Rock to Yucaipa (California) | 768.56 mi (1,236.88 km) |
| Castle Rock to Yucca Valley (California) | 735.26 mi (1,183.28 km) |
| Castle Rock to Yukon (Oklahoma) | 471.16 mi (758.26 km) |
| Castle Rock to Yulee (Florida) | 1,444.01 mi (2,323.91 km) |
| Castle Rock to Yuma (Arizona) | 715.49 mi (1,151.47 km) |
| Castle Rock to Zachary (Louisiana) | 979.08 mi (1,575.67 km) |
