Run the River Marathon

Kennewick, WA, USAApril 18, 2026
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Race Day Weather

cloudy
54°
67° high
Windy
Dry

Comfortable temps, warming through the race, moderate wind

Mild 54°F temps at gun time mean comfortable early miles without overheating risk. Temperatures rising to 67°F through the course will gradually increase perceived effort in the second half. Moderate winds around 15mph may affect pacing on open sections of the course.

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Pace Calculator

Distance: 26.2mi
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Common Goals:

The Run the River event includes various distances ranging from a 5k to a full marathon. This road race features a scenic course that travels through the towns of Kennewick, Richland, and Pasco all while staying next to the mighty Columbia River. The start/finish line is located next to the river in Columbia Park.

The course follow paved paths and roadways the entire time and offers participants with great views of beautifully landscaped parks, the meandering Columbia River, as well as the rugged surrounding mountains. The flat courses and cool spring weather will provide runners with a prime opportunity for a fast finish time if that is their goal. Likewise, the course lends itself well to runners of all abilities as well as walkers... which tend to have the best time out there!
Source

Area Map

Course Map

FAQ

When is the 2026 Run the River Marathon?

The 2026 Run the River Marathon will be held on Saturday April 18, 2026.

Is the Run the River Marathon a Boston Marathon Qualifier?

Yes, the Run the River Marathon is an official Boston Marathon qualifier.

What will the weather be like for the 2026 Run the River Marathon?

The forecast calls for a high of 67°F and a low of 52°F with a 13% chance of rain. Check our detailed hourly forecast above for the best marathon race plan.

Historical Weather

Based on 1 years of data
Avg Temp
68°F
L:52° H:68°
RunScore
8
Conditions
Rain Freq
100%
1 of 1 yrs
Wind8mph
Dew43°F

Temperature History

Range of temperatures during race hours for each year.

Detailed History

YearConditionsLow / HighRainScore
2025
partly-cloudy-day
52°/68°Light
8