| Castle Rock to Kinston (North Carolina) | 1,518.27 mi (2,443.42 km) |
| Castle Rock to Kirkland (Washington) | 1,038.38 mi (1,671.12 km) |
| Castle Rock to Kirksville (Missouri) | 653.83 mi (1,052.25 km) |
| Castle Rock to Kirkwood (Missouri) | 776.37 mi (1,249.45 km) |
| Castle Rock to Kiryas Joel (New York) | 1,612.89 mi (2,595.70 km) |
| Castle Rock to Kissimmee (Florida) | 1,540.48 mi (2,479.16 km) |
| Castle Rock to Klamath Falls (Oregon) | 905.00 mi (1,456.46 km) |
| Castle Rock to Knightdale (North Carolina) | 1,458.88 mi (2,347.84 km) |
| Castle Rock to Knik-Fairview (Alaska) | 2,416.88 mi (3,889.59 km) |
| Castle Rock to Knoxville (Tennessee) | 1,164.39 mi (1,873.90 km) |
| Castle Rock to Kokomo (Indiana) | 993.26 mi (1,598.50 km) |
| Castle Rock to Kuna (Idaho) | 661.07 mi (1,063.89 km) |
| Castle Rock to Kyle (Texas) | 759.03 mi (1,221.54 km) |
| Castle Rock to La Cañada Flintridge (California) | 819.09 mi (1,318.19 km) |
| Castle Rock to La Crescenta-Montrose (California) | 820.06 mi (1,319.76 km) |
