| Castle Rock to Pell City (Alabama) | 1,105.55 mi (1,779.22 km) |
| Castle Rock to Pella (Iowa) | 642.94 mi (1,034.71 km) |
| Castle Rock to Pembroke Pines (Florida) | 1,689.57 mi (2,719.11 km) |
| Castle Rock to Pendleton (Oregon) | 832.03 mi (1,339.02 km) |
| Castle Rock to Pensacola (Florida) | 1,172.62 mi (1,887.15 km) |
| Castle Rock to Peoria (Arizona) | 565.23 mi (909.65 km) |
| Castle Rock to Peoria (Illinois) | 810.32 mi (1,304.08 km) |
| Castle Rock to Perris (California) | 786.35 mi (1,265.51 km) |
| Castle Rock to Perry (Georgia) | 1,270.75 mi (2,045.07 km) |
| Castle Rock to Perry Hall (Maryland) | 1,508.85 mi (2,428.26 km) |
| Castle Rock to Perrysburg (Ohio) | 1,122.25 mi (1,806.09 km) |
| Castle Rock to Perth Amboy (New Jersey) | 1,613.64 mi (2,596.91 km) |
| Castle Rock to Peru (Indiana) | 995.57 mi (1,602.21 km) |
| Castle Rock to Petal (Mississippi) | 1,037.94 mi (1,670.40 km) |
| Castle Rock to Petaluma (California) | 958.55 mi (1,542.64 km) |
