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Race Overview
The Lock 2 Lock Marathon runs along the flat, tree-lined C&O Canal Towpath in Williamsport, Maryland, out and back between Lock 44 and Lock 43. The marathon covers the 6.56-mile stretch twice, while the half marathon and 10K each run it once from later start times. With no more than 40 feet of total elevation change, the course is Boston Marathon-qualifying certified. The race is organized by 2 Lowe Run Company and a portion of proceeds benefits the Perinatal Bereavement Fund through the Meritus Foundation.
WikipediaFAQ
When is the 2027 Lock 2 Lock Marathon?
The 2027 Lock 2 Lock Marathon will be held on Saturday September 11, 2027.
Is the Lock 2 Lock Marathon a Boston Marathon Qualfier?
Yes, the Lock 2 Lock Marathon is an official Boston Marathon qualifier.
What is the time limit for the Lock 2 Lock Marathon?
The time limit for the Lock 2 Lock Marathon is 7.5 hours.
Lock 2 Lock Marathon Course Map
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Lock 2 Lock Marathon Weather History
Lock 2 Lock Marathon Weather Averages
Average Temp: 71°, Average Low: 64°, Average High: 79°
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 67° | 68° | 69° | 72° | 74° | 75° | 77° | 78° |
| Feel | 67° | 68° | 69° | 72° | 74° | 76° | 78° | 78° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 2mph | 3mph | 3mph | 3mph | 5mph | 7mph | 8mph | 10mph |
| Dew | 64° | 65° | 65° | 64° | 63° | 62° | 63° | 61° |
| RunScore |  | |  | | | | | |
Lock 2 Lock Marathon 2026
Sep 12, 2026
Partly cloudy throughout the day.
Low: 66°, High: 76°, Light Rain
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|---|
| Temp |  67° | 68° | 68° | 72° | 74° | 75° | 76° | 76° |
| Feel | 67° | 68° | 68° | 72° | 74° | 75° | 76° | 76° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 0mph | 1mph | 1mph | 3mph | 7mph | 9mph | 10mph | 9mph |
| Dew | 64° | 65° | 65° | 64° | 63° | 65° | 66° | 67° |
| RunScore | | | | | | | | |
Lock 2 Lock Marathon 2025
Sep 6, 2025
Partly cloudy throughout the day with late afternoon rain.
Low: 63°, High: 83°, Light Rain
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|---|
| Temp |  70° | 74° | 76° | 79° | 82° | 83° | 82° | 78° |
| Feel | 70° | 74° | 76° | 79° | 83° | 84° | 83° | 78° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 3mph | 3mph | 3mph | 2mph | 6mph | 10mph | 14mph | 11mph |
| Dew | 66° | 66° | 66° | 64° | 64° | 63° | 63° | 62° |
| RunScore | | | | | | |  | |
Lock 2 Lock Marathon 2024
Sep 7, 2024
Partly cloudy throughout the day with morning rain.
Low: 59°, High: 73°, Moderate Rain
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 63° | 63° |  62° | 61° | 61° | 62° | 66° | 71° |
| Feel | 63° | 63° | 62° | 61° | 61° | 62° | 66° | 71° |
| Rain | - | - | light | light | - | - | - | - |
| Wind | 3mph | 7mph | 8mph | 5mph | 3mph | 5mph | 4mph | 14mph |
| Dew | 60° | 60° | 60° | 58° | 56° | 54° | 55° | 49° |
| RunScore | |  | | | | | | |
Lock 2 Lock Marathon 2023
Sep 9, 2023
Partly cloudy throughout the day with rain.
Low: 67°, High: 86°, Moderate Rain
| Time | 8AM | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 67° |  68° | 71° | 75° | 78° | 81° | 83° | 86° |
| Feel | 67° | 68° | 71° | 75° | 78° | 84° | 87° | 89° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 2mph | 1mph | 1mph | 1mph | 5mph | 4mph | 4mph | 8mph |
| Dew | 67° | 68° | 68° | 69° | 68° | 68° | 69° | 68° |
| RunScore | | | | | | | | |