Lock 2 Lock Marathon

The Lock 2 Lock Marathon, Half Marathon, and 10K take place annually along the scenic Chesapeake and Ohio Canal Towpath in Williamsport, Maryland. The 2025 event, the 4th annual, offers a Boston Qualifier certified course featuring flat terrain with minimal elevation gain. The marathon consists of two out-and-back loops between Lock 44 and Lock 43, while the half marathon completes one loop, and the 10K covers a shorter out-and-back segment.

Aid stations provide water, Gatorade, pickle juice, and snacks. Participants receive custom race swag and awards across multiple age groups. The event emphasizes a family-friendly atmosphere and professional timing, with parking available nearby and lodging options in the area. Visit the organization's website for the most recent information.