Lock 2 Lock Marathon/Half Marathon/10k
About this race
What: 5th Annual Lock 2 Lock Marathon, Half Marathon and 10K
When: Saturday, September 12, 2026
Where: Entirely along the C&O Canal Towpath in Williamsport, Maryland
All three races take place on the C&O Canal towpath. The start/finish area will be Lock 44 (DO NOT USE FOR PARKING).
This is a BQ certified course! 2026 times can be used for 2027.
The course certification number is MD22006NP.
2027 BQ Standards
Marathon – race details
https://www.strava.com/routes/3038509126320956732 Course Map
The race will start at 7:30 a.m. on September 12, 2026. Cutoff time is 3:00 p.m. (allowing for a pace of 17 minutes and 11 seconds per mile. Runners will start near Lock 44 and travel in a generally southeasterly direction for 6.56 miles to Lock 43 (exact point to be specified, marked and staffed by event volunteers), then turn around and travel back to Lock 44. Course elevation is no more than 40 feet for the entire distance. Runners will complete this out-and-back loop twice. Aid stations will be at miles 2, 4, 6.56, 9.12, 11.12, 13.12, 15.12, 17.12, 19.68, 22.24, 24.24 and finish line. AS will be stocked with water, Gatorade Endurance, pickle juice, potato chips, and other TBD snacks. There will also be a tarp at the start/finish line where you can leave gu's, bottles, or other race day needs.
Half Marathon details
https://www.strava.com/routes/3038509126320956732 Course Map
The race will start at 8:00 a.m. on Sept. 12, 2026. Cutoff time is 1:00 p.m. Runners will start near Lock 44 and travel in a generally southeasterly direction for 6.56 miles to about Lock 43, then turn around and run back to Lock 44. They will complete this out-and-back loop one time. Course elevation is no more than 20 feet for the entire distance.Aid stations will be at miles 2, 4, 6.56, 9.12, 11.12, and finish line. AS will be stocked with water, Gatorade Endurance, pickle juice, potato chips, and other TBD snacks.
10K details
https://www.strava.com/routes/3038508438366518588 Course Map
The race will start at 8:15 a.m. on Sept. 12, 2026. Cutoff time is 11:15 a.m. Runners will start near Lock 44, run 3.1 miles on the towpath towards Washington D.C., turn around and run 3.1 miles back to Lock 44. Course elevation is no more than 10 feet for the entire distance. Aid stations will be at miles 2, 4, and the finish line. AS will be stocked with water, Gatorade Endurance, pickle juice, potato chips, and other TBD snacks.
Pick your distance
Running
Marathon
The race will start at 7:30 a.m. on September 11, 2027. Cutoff time is 3:00 p.m. (allowing for a pace of 17 minutes and 11 seconds per mile. Runners will start near Lock 44 and travel in a generally southeasterly direction for 6.56 miles to Lock 43 (exact point to be specified, marked and staffed by event volunteers), then turn around and travel back to Lock 44. Course elevation is no more than 40 feet for the entire distance. Runners will complete this out-and-back loop twice. Aid stations will be at miles 2, 4, 6.56, 9.12, 11.12, 13.12, 15.12, 17.12, 19.68, 22.24, 24.24 and finish line.
Half Marathon
The race will start at 8:00 a.m. on Sept. 11, 2027. Cutoff time is 1:00 p.m. Runners will start near Lock 44 and travel in a generally southeasterly direction for 6.56 miles to about Lock 43, then turn around and run back to Lock 44. They will complete this out-and-back loop one time. Course elevation is no more than 20 feet for the entire distance.Aid stations will be at miles 2, 4, 6.56, 9.12, 11.12, and the finish line.
10k
The race will start at 8:15 a.m. on Sept. 11, 2027. Cutoff time is 11:15 a.m. Runners will start near Lock 44, run 3.1 miles on the towpath towards Washington D.C., turn around and run 3.1 miles back to Lock 44. Course elevation is no more than 10 feet for the entire distance.Aid stations will be at miles 2, 4, and the finish line.
Typical race-day weather
Based on 4 years of Open-Meteo archive data for this event's race dates in Williamsport, plus the 3 days either side.
The sun rises at 6:48 AM and sets at 7:27 PM local time (EDT) in Williamsport on September 11, 2027 — 12h 38m of daylight.
Course
No course map published yet.
The organizer hasn't released a route for this event, and we don't publish guesses. If you're the organizer, send us a GPX file and we'll draw the profile.
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Results — Lock 2 Lock Marathon/Half Marathon/10k
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🏃 Plan Your Next Race in Williamsport
Find upcoming events by distance:
- Williamsport 5K Races 3 races
- Williamsport Running Calendar 2026 5 races
Where this page comes from. Race details were last updated on . We re-check listings regularly and again in the week before race day.
- Entries, prices, waves and inclusions — the event's official registration page
- Temperature and humidity — Copernicus ERA5 reanalysis via Open-Meteo (CC BY 4.0)
- Elevation and terrain relief — Copernicus DEM GLO-90, ESA (CC BY 4.0)
- Comparisons and counts — Race Discovery calendar, 5 Williamsport events
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