| Difficult Run to Wixom (Michigan) | 409.27 mi (658.66 km) |
| Difficult Run to Woburn (Massachusetts) | 407.99 mi (656.60 km) |
| Difficult Run to Wolf Trap (Virginia) | 4.28 mi (6.88 km) |
| Difficult Run to Wood Dale (Illinois) | 597.48 mi (961.54 km) |
| Difficult Run to Wood River (Illinois) | 684.14 mi (1,101.02 km) |
| Difficult Run to Woodbridge (Virginia) | 18.64 mi (30.00 km) |
| Difficult Run to Woodburn (Oregon) | 2,343.69 mi (3,771.80 km) |
| Difficult Run to Woodburn (Virginia) | 7.12 mi (11.47 km) |
| Difficult Run to Woodbury (Minnesota) | 899.93 mi (1,448.30 km) |
| Difficult Run to Woodbury (New York) | 239.85 mi (386.00 km) |
| Difficult Run to Woodcrest (California) | 2,234.80 mi (3,596.56 km) |
| Difficult Run to Woodhaven (Michigan) | 381.35 mi (613.72 km) |
| Difficult Run to Woodinville (Washington) | 2,298.49 mi (3,699.06 km) |
| Difficult Run to Woodland (California) | 2,367.18 mi (3,809.61 km) |
| Difficult Run to Woodlawn (Maryland) | 42.51 mi (68.41 km) |
