Lock 2 Lock Marathon

Williamsport, MD, USA · September 11, 2027
partly-cloudy-day64°·75° high·Light·Dry
5
Register

Race Day Weather

partly-cloudy-day
64°at start
79° high
Light
Dry
Your goal
0:00:00

Comfortable temps, warming through the race

Starting at 64°F, heat will be a factor from the gun — go out conservative and stay on top of hydration. Temperatures rising to 79°F through the course will gradually increase perceived effort in the second half. Light winds shouldn't be a major factor for pacing. Moderate humidity at 68% is worth noting for effort level, especially in later miles.

Race day forecast available in 317 days
partly-cloudy-night6
partly-cloudy-night5
partly-cloudy-day5
partly-cloudy-day5
partly-cloudy-day5
partly-cloudy-day4
partly-cloudy-day4
partly-cloudy-day3
partly-cloudy-day3
partly-cloudy-day3
partly-cloudy-day3
partly-cloudy-day3
partly-cloudy-day3

Pace Calculator

26.2mi
0:00:00
HH:MM:SS
Pace
—

Enter a finish time to see what race day does to it.

Common Goals:

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 Plan

Get your personalized Lock 2 Lock Marathon race plan

A mile-by-mile breakdown of where your time goes, weather-adjusted splits, fueling timeline with aid stations, packing checklist, carb tracker, spectator guide, all built around your goal and race-day conditions.

Race Pace
Weather Splits
Nutrition
Gear & Packing
T-Minus
Carb Tracker
Spectator Guide
Race Band

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.

Race weekend

Saturday, September 11
7:30 AMMarathon (26.2 mi)
8:00 AMHalf Marathon (13.1 mi)
8:15 AM10K (6.2 mi)

FAQ

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 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 2027 Lock 2 Lock Marathon?

The forecast calls for a high of 81°F and a low of 63°F with a 9% chance of rain.

Historical Weather

Based on 4 years of data
Avg Temp
68°F
L:66° H:72°
RunScore
4
Conditions
Rain Freq
25%
1 of 4 yrs
Wind2mph
Dew64°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2026
cloudy
67°/72°-
4
2025
partly-cloudy-day
70°/79°-
4
2024
partly-cloudy-day
61°/63°Light
6
2023
clear-day
67°/75°-
4