Secret City Half Marathon

Oak Ridge, TN, USA · November 14, 2026
partly-cloudy-day44°·52° high·Light·Dry
10
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Race Day Weather

partly-cloudy-day
44°at start
59° high
Light
Dry
Your goal
0:00:00

Cool conditions, steady pace

Runners will face a cool start at 40°F, warming to 59°F by the finish. Winds from the SSW at 5 mph will be light, with gusts reaching 15 mph. With humidity at 55%, conditions are favorable, allowing for a steady pace throughout, with no need for hydration adjustments.

Race day forecast available in 3 days
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Race Info

The Secret City Half Marathon and 5K takes place each November in Oak Ridge, Tennessee, a city built in secrecy during World War II for the Manhattan Project. Both courses start and finish at the Melton Lake Park peninsula. The half marathon runs along Melton Lake, past an operational quarry, and down a tree-lined private road before returning along the water to the finish. The 5K stays along the Melton Lake walking trail out to Elza Gate Park and back.

Race weekend

Saturday, November 14
9:00 AMSecret City Half Marathon (13.1 mi)
9:15 AMSecret City 5K (3.1 mi)
Area Map

Course Map

FAQ

When is the 2026 Secret City Half Marathon?

The 2026 Secret City Half Marathon will be held on Saturday November 14, 2026.

What will the weather be like for the 2026 Secret City Half Marathon?

The forecast calls for a high of 61°F and a low of 41°F with a 10% chance of rain.

Historical Weather

Based on 2 years of data
Avg Temp
51°F
L:48° H:54°
RunScore
9
Conditions
Rain Freq
0%
0 of 2 yrs
Wind2mph
Dew39°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScoreResults
2025
partly-cloudy-day
52°/62°-
9
2024
cloudy
45°/46°-
10