Silver Comet Marathon

Mableton, GA, USA · October 31, 2026
partly-cloudy-day50°·62° high·Light·Dry
9
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Race Day Weather

partly-cloudy-day
50°at start
68° high
Light
Dry
Your goal
0:00:00

Cool start, warming trend ahead

Runners will face a temperature rise from 50°F to 68°F during the race, with average humidity at 68% and a dew point of 47°F. Wind will be light, with max gusts reaching 20 mph. Runners should consider adjusting their pacing as temperatures rise, especially after the halfway mark.

Race day forecast available in 16 days
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Race Info

The Silver Comet Marathon runs on the paved Silver Comet Trail, a former railroad corridor west of Atlanta in Mableton, Georgia. The out-and-back course starts near the trail's Floyd Road trailhead, heads southwest toward the Alabama state line, then finishes near the Mavell Road trailhead in Smyrna. It is USATF-certified and a Boston Marathon qualifier, marketed as flat and fast. The race has run annually for over a decade alongside a half marathon on the same morning, part of the Silver Comet Races series that also puts on a spring 10K.

Race weekend

Saturday, October 31
7:15 AMMarathon (26.2 mi)
7:45 AMHalf Marathon (13.1 mi)
Area Map

Course Map

FAQ

When is the 2026 Silver Comet Marathon?

The 2026 Silver Comet Marathon will be held on Saturday October 31, 2026.

Is the Silver Comet Marathon a Boston Marathon Qualifier?

Yes, the Silver Comet Marathon is an official Boston Marathon qualifier.

What is the time limit for the Silver Comet Marathon?

The time limit for the Silver Comet Marathon is 6 hours.

What will the weather be like for the 2026 Silver Comet Marathon?

The forecast calls for a high of 69°F and a low of 49°F with a 7% chance of rain.

Historical Weather

Based on 6 years of data
Avg Temp
58°F
L:54° H:65°
RunScore
7
Conditions
Rain Freq
17%
1 of 6 yrs
Wind5mph
Dew52°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2025
clear-night
43°/62°-
10
2024
clear-night
55°/72°-
7
2023
clear-night
55°/71°-
6
2022
clear-night
52°/59°-
9
2021
cloudy
53°/55°-
9
2019
cloudy
67°/69°Light
5