| Difficult Run to North Tustin (California) | 2,260.48 mi (3,637.90 km) |
| Difficult Run to North Valley (New Mexico) | 1,627.92 mi (2,619.88 km) |
| Difficult Run to North Valley Stream (New York) | 229.09 mi (368.69 km) |
| Difficult Run to North Wantagh (New York) | 238.56 mi (383.93 km) |
| Difficult Run to Northampton (Massachusetts) | 340.57 mi (548.10 km) |
| Difficult Run to Northampton (Pennsylvania) | 157.87 mi (254.07 km) |
| Difficult Run to Northbrook (Illinois) | 593.81 mi (955.65 km) |
| Difficult Run to Northbrook (Ohio) | 388.57 mi (625.35 km) |
| Difficult Run to Northdale (Florida) | 803.00 mi (1,292.30 km) |
| Difficult Run to Northfield (Minnesota) | 900.17 mi (1,448.69 km) |
| Difficult Run to Northglenn (Colorado) | 1,470.88 mi (2,367.15 km) |
| Difficult Run to Northlake (Illinois) | 592.70 mi (953.86 km) |
| Difficult Run to Northport (Alabama) | 691.93 mi (1,113.56 km) |
| Difficult Run to Northview (Michigan) | 516.62 mi (831.42 km) |
| Difficult Run to Norton (Ohio) | 270.95 mi (436.05 km) |
