Idaho Falls Marathon

Idaho Falls, ID, USA • July 25, 2026

Race Day Weather

55°

87° high

Breezy

Dry

Warm afternoon, steady winds

Runners will face temperatures rising from 55°F to 84°F, with a moderate wind from SW at 10 mph. Humidity will hover around 53%, providing a comfortable start but requiring caution as the day warms. It's advisable to adjust pacing in the later stages and stay hydrated throughout the race.

Race day forecast available in 93 days

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Pre-raceRace windowPost-race

Pace Calculator

Distance: 26.2mi

Target Finish Time

0:00:00

HH:MM:SS

Pace

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Weather Adj.

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Common Goals:

The Idaho Falls Marathon offers a scenic and fast course, beginning and ending at Snake River Landing. The marathon course runs the first half west through beautiful southeast Idaho farm country and back through historic New Sweden. The marathon returns to the start point to continue clockwise around the Snake River Greenbelt for the remaining half and finishes where you started.

Course Map

FAQ

When is the 2026 Idaho Falls Marathon?

The 2026 Idaho Falls Marathon will be held on Saturday July 25, 2026.

What will the weather be like for the 2026 Idaho Falls Marathon?

The forecast calls for a high of 88°F and a low of 55°F with a 0% chance of rain.

Historical Weather

Based on 11 years of data

Avg Temp

81°F

L:54° H:81°

RunScore

Conditions

Rain Freq

1 of 11 yrs

Wind10mph

Dew46°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

Year	Low / High	Rain	Dew Point
2025 Idaho Falls Marathon Clear conditions throughout the day. 2025	45°/79°	-	38°
2024 Idaho Falls Marathon Partly cloudy throughout the day with late afternoon rain. 2024	51°/82°	-	48°
2023 Idaho Falls Marathon Clear conditions throughout the day. 2023	54°/84°	-	53°
2022 Idaho Falls Marathon Clear conditions throughout the day. 2022	53°/87°	-	50°
2021 Idaho Falls Marathon Partly cloudy throughout the day with rain clearing later. 2021	63°/76°	Moderate	62°
2019 Idaho Falls Marathon Partly cloudy throughout the day with late afternoon rain. 2019	65°/75°	-	51°
2018 Idaho Falls Marathon Partly cloudy throughout the day. 2018	54°/79°	-	48°
2017 Idaho Falls Marathon Clear conditions throughout the day. 2017	50°/83°	-	52°
2016 Idaho Falls Marathon Clear conditions throughout the day. 2016	57°/86°	-	45°
2015 Idaho Falls Marathon Clear conditions throughout the day. 2015	46°/81°	-	46°
2014 Idaho Falls Marathon Clear conditions throughout the day. 2014	55°/82°	-	39°

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