| Castle Rock to Sumter (South Carolina) | 1,401.99 mi (2,256.28 km) |
| Castle Rock to Sun City (Arizona) | 572.84 mi (921.90 km) |
| Castle Rock to Sun City Center (Florida) | 1,518.98 mi (2,444.57 km) |
| Castle Rock to Sun City West (Arizona) | 573.24 mi (922.53 km) |
| Castle Rock to Sun Lakes (Arizona) | 577.31 mi (929.09 km) |
| Castle Rock to Sun Prairie (Wisconsin) | 850.97 mi (1,369.51 km) |
| Castle Rock to Sun Valley (Nevada) | 794.96 mi (1,279.36 km) |
| Castle Rock to Sun Village (California) | 795.14 mi (1,279.66 km) |
| Castle Rock to Sunland Park (New Mexico) | 531.15 mi (854.80 km) |
| Castle Rock to Sunny Isles Beach (Florida) | 1,703.10 mi (2,740.88 km) |
| Castle Rock to Sunnyside (Washington) | 902.72 mi (1,452.79 km) |
| Castle Rock to Sunnyvale (California) | 938.75 mi (1,510.78 km) |
| Castle Rock to Sunrise (Florida) | 1,685.25 mi (2,712.15 km) |
| Castle Rock to Sunrise Manor (Nevada) | 598.57 mi (963.30 km) |
| Castle Rock to Sunset (Florida) | 1,702.34 mi (2,739.65 km) |
