Lock 2 Lock Marathon

Williamsport, MD, USA · September 12, 2026
partly-cloudy-day62°·80° high·Light·Dry
8
Register

Race Day Weather

partly-cloudy-day
62°at start
80° high
Light
Dry

Warm day, adjust pace early

Runners will face a temperature rise from 62°F at the start to a peak of 81°F by the finish. With humidity at 69% and a light wind from the south, pacing adjustments are crucial, especially in the later laps as it gets warmer. It's advisable to start conservatively and focus on hydration to maintain performance throughout the race.

partly-cloudy-night8
partly-cloudy-night8
partly-cloudy-day8
partly-cloudy-day8
partly-cloudy-day9
partly-cloudy-day8
partly-cloudy-day8
partly-cloudy-day8
partly-cloudy-day8
partly-cloudy-day7
partly-cloudy-day7
partly-cloudy-day7
partly-cloudy-day7

Get forecast alerts for Lock 2 Lock Marathon

We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.

Race Info

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.

FAQ

When is the 2026 Lock 2 Lock Marathon?

The 2026 Lock 2 Lock Marathon will be held on Saturday September 12, 2026.

Is the Lock 2 Lock Marathon a Boston Marathon Qualifier?

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.

What will the weather be like for the 2026 Lock 2 Lock Marathon?

The forecast calls for a high of 80°F and a low of 61°F with a 7% chance of rain.

Historical Weather

Based on 3 years of data
Avg Temp
78°F
L:66° H:80°
RunScore
7
Conditions
Rain Freq
33%
1 of 3 yrs
Wind11mph
Dew60°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2025
clear-day
70°/83°-
7
2024
cloudy
61°/71°Light
8
2023
partly-cloudy-day
67°/86°-
7