racecast.ioPartly cloudy throughout the day.
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Race Overview
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.
WikipediaFAQ
When is the 2026 Secret City Half Marathon?
The 2026 Secret City Half Marathon will be held on Saturday November 14, 2026.
Secret City Half Marathon Weather History
Secret City Half Marathon Weather Averages
Average Temp: 52°, Average Low: 41°, Average High: 61°
| Time | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM | 4PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 48° | 51° | 54° | 57° | 58° | 60° | 60° | 61° |
| Feel | 48° | 51° | 54° | 57° | 58° | 60° | 60° | 61° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 0mph | 3mph | 4mph | 10mph | 2mph | 3mph | 4mph | 10mph |
| Dew | 39° | 39° | 39° | 42° | 42° | 44° | 44° | 45° |
| RunScore |  |  | | | | | | |
Secret City Half Marathon 2025
Nov 15, 2025
Partly cloudy throughout the day.
Low: 44°, High: 71°
| Time | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM | 4PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 52° | 57° | 62° | 67° |  68° | 69° | 70° | 71° |
| Feel | 52° | 57° | 62° | 67° | 68° | 69° | 70° | 71° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 0mph | 6mph | 7mph | 19mph | 0mph | 6mph | 7mph | 20mph |
| Dew | 43° | 42° | 44° | 48° | 49° | 51° | 52° | 52° |
| RunScore | |  | |  | | | | |
Secret City Half Marathon 2024
Nov 23, 2024
Partly cloudy throughout the day.
Low: 38°, High: 50°
| Time | 9AM | 10AM | 11AM | 12PM | 1PM | 2PM | 3PM | 4PM |
|---|---|---|---|---|---|---|---|---|
| Temp | 45° | 45° | 46° | 47° | 49° | 50° |  50° | 50° |
| Feel | 45° | 45° | 46° | 47° | 48° | 50° | 50° | 50° |
| Rain | - | - | - | - | - | - | - | - |
| Wind | 0mph | 0mph | 0mph | 0mph | 3mph | 0mph | 0mph | 0mph |
| Dew | 34° | 35° | 34° | 35° | 35° | 36° | 36° | 37° |
| RunScore | | | | | | | | |