| Boulder to Kilgore (Texas) | 782.12 mi (1,258.69 km) |
| Boulder to Killeen (Texas) | 748.45 mi (1,204.52 km) |
| Boulder to King City (California) | 900.99 mi (1,450.00 km) |
| Boulder to King of Prussia (Pennsylvania) | 1,572.08 mi (2,530.01 km) |
| Boulder to Kingman (Arizona) | 582.70 mi (937.76 km) |
| Boulder to Kings Mountain (North Carolina) | 1,344.66 mi (2,164.02 km) |
| Boulder to Kings Park (New York) | 1,674.24 mi (2,694.44 km) |
| Boulder to Kings Park West (Virginia) | 1,488.40 mi (2,395.35 km) |
| Boulder to Kingsburg (California) | 811.82 mi (1,306.50 km) |
| Boulder to Kingsland (Georgia) | 1,463.54 mi (2,355.35 km) |
| Boulder to Kingsport (Tennessee) | 1,251.63 mi (2,014.30 km) |
| Boulder to Kingston (New York) | 1,626.66 mi (2,617.85 km) |
| Boulder to Kingston (Pennsylvania) | 1,534.51 mi (2,469.55 km) |
| Boulder to Kingstowne (Virginia) | 1,497.15 mi (2,409.43 km) |
| Boulder to Kingsville (Texas) | 962.41 mi (1,548.85 km) |
