Mystery Mountain Marathon

Chatsworth, GA, USA · October 18, 2026

50°·70° high·Light·Dry

Weather

Race Day Weather

50°at start

70° high

Light

Dry

Cool start, warming trend

Runners will face a temperature rise from 50°F at the start to 70°F by race end. Light winds from the SE at 6 mph will keep conditions manageable, with humidity at 59%. As temperatures increase, runners should adjust their pace conservatively to stay comfortable.

Race day forecast available in 47 days

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Race Info

Marathon and 12-mile trail races traversing difficult, sometimes technical but stunningly beautiful trails, featuring panoramic views of fall foliage displayed on the surrounding mountains. Climbing and descending for about 5,500 feet of elevation gain, runners will enjoy single track, rugged mountain bike, and smooth horse trails while running over and around Fort Mountain, passing the mysterious rock wall built at the top of the mountain over 1,000 years ago. Source

Website

Course Map

FAQ

When is the 2026 Mystery Mountain Marathon?

The 2026 Mystery Mountain Marathon will be held on Sunday October 18, 2026.

Is the Mystery Mountain Marathon a Boston Marathon Qualifier?

No, the Mystery Mountain Marathon is NOT a Boston Marathon qualifier.

What is the time limit for the Mystery Mountain Marathon?

The time limit for the Mystery Mountain Marathon is 8 hours.

What will the weather be like for the 2026 Mystery Mountain Marathon?

The forecast calls for a high of 72°F and a low of 51°F with a 6% chance of rain.

Historical Weather

Based on 17 years of data

Avg Temp

75°F

L:51° H:75°

RunScore

Conditions

Rain Freq

0 of 17 yrs

Wind5mph

Dew52°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2025 Mystery Mountain Marathon Clear conditions throughout the day. 2025	47°/79°	-	51°
2024 Mystery Mountain Marathon Clear conditions throughout the day. 2024	50°/82°	-	56°
2023 Mystery Mountain Marathon Clear conditions throughout the day. 2023	38°/67°	-	37°
2022 Mystery Mountain Marathon Partly cloudy throughout the day. 2022	43°/68°	-	40°
2021 Mystery Mountain Marathon Clear conditions throughout the day. 2021	63°/81°	-	65°
2019 Mystery Mountain Marathon Partly cloudy throughout the day. 2019	54°/70°	-	46°
2018 Mystery Mountain Marathon Partly cloudy throughout the day. 2018	56°/75°	-	57°
2017 Mystery Mountain Marathon Partly cloudy throughout the day. 2017	61°/84°	-	65°
2016 Mystery Mountain Marathon Clear conditions throughout the day. 2016	52°/74°	-	39°
2015 Mystery Mountain Marathon Partly cloudy throughout the day. 2015	57°/72°	-	58°
2014 Mystery Mountain Marathon Partly cloudy throughout the day with rain. 2014	63°/75°	-	67°
2013 Mystery Mountain Marathon Clear conditions throughout the day. 2013	51°/79°	-	58°
2012 Mystery Mountain Marathon Partly cloudy throughout the day. 2012	59°/73°	-	59°
2011 Mystery Mountain Marathon Partly cloudy throughout the day. 2011	53°/72°	-	53°
2010 Mystery Mountain Marathon Clear conditions throughout the day. 2010	43°/83°	-	48°
2009 Mystery Mountain Marathon Clear conditions throughout the day. 2009	38°/70°	-	40°
2008 Mystery Mountain Marathon Clear conditions throughout the day. 2008	32°/72°	-	41°

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