| Hard to Keizer (Oregon) | 5,432.73 mi (8,743.13 km) |
| Hard to Keller (Texas) | 5,276.27 mi (8,491.33 km) |
| Hard to Kelso (Washington) | 5,362.74 mi (8,630.50 km) |
| Hard to Kemp Mill (Maryland) | 4,171.05 mi (6,712.66 km) |
| Hard to Ken Caryl (Colorado) | 5,213.40 mi (8,390.16 km) |
| Hard to Kendale Lakes (Florida) | 4,934.23 mi (7,940.88 km) |
| Hard to Kendall (Florida) | 4,933.78 mi (7,940.15 km) |
| Hard to Kendall Park (New Jersey) | 4,009.78 mi (6,453.12 km) |
| Hard to Kendall West (Florida) | 4,935.69 mi (7,943.22 km) |
| Hard to Kenmore (New York) | 4,077.53 mi (6,562.14 km) |
| Hard to Kenmore (Washington) | 5,250.68 mi (8,450.15 km) |
| Hard to Kenner (Louisiana) | 5,145.79 mi (8,281.35 km) |
| Hard to Kennesaw (Georgia) | 4,716.20 mi (7,589.99 km) |
| Hard to Kennett (Missouri) | 4,829.88 mi (7,772.94 km) |
| Hard to Kennewick (Washington) | 5,264.85 mi (8,472.95 km) |
