Boonsboro to Williamsport, MD, Maryland
The oldest ultramarathon in North America, first run in 1963. The course traverses the Appalachian Trail over South Mountain, follows the C&O Canal towpath, and finishes along the Potomac River. A rite of passage for East Coast ultrarunners.
| Name | Mile | Elevation | Crew Access | Drop Bag | Cutoff |
|---|---|---|---|---|---|
| Gathland Gap (AT) | 6 | 1,200 ft | Yes | Yes | — |
| Weverton Cliffs (AT) | 15 | 800 ft | Yes | Yes | — |
| Antietam Aqueduct (C&O) | 26 | 480 ft | Yes | Yes | 7:00 |
| Snyder's Landing (C&O) | 38 | 460 ft | Yes | Yes | 10:00 |
| Dam 4 (River) | 44 | 440 ft | Yes | Yes | 11:00 |
| Segment | Miles | Terrain | Difficulty | Notes |
|---|---|---|---|---|
| Boonsboro to AT (South Mountain) | 0–15 | mixed | hard | Rocky Appalachian Trail section. Technical footing. |
| AT to C&O Canal Towpath | 15–26 | descent | moderate | Transition to flat towpath running. |
| C&O Canal Towpath | 26–42 | flat | easy | Flat crushed gravel. Make up time here. |
| River Section to Williamsport | 42–50 | rolling | moderate | Rolling river trails to the finish. |
View the full interactive elevation profile, 3D course flyover, and race strategy tools on HARDN.