In 33 days · Sun, Sep 20, 2026
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When
Sunday, September 20th, 2026
Where
4900 Byrnesville Rd, Jefferson County MO
Distance
5K
Typical weather
63–82°F · low rain risk
See last 10 years
On this date: rain 1 of the last 10 years
2025
65–81°F
rain
2024
71–91°F
dry
2023
63–73°F
dry
2022
71–96°F
dry
2021
69–86°F
dry
2020
49–73°F
dry
2019
69–85°F
dry
2018
73–92°F
dry
2017
71–92°F
dry
2016
68–87°F
dry
Best months to race in Missouri →
About this race
Event Overview
- Event Name: The Big River Run
- Date: 2026-09-20
- Location: 4900 Byrnesville Rd, Jefferson County, MO
- URL: Register Here
Race Details
- Organizer: Jefferson County Parks and Recreation Department
- Event Types: 10 Mile and 5K
- Venue: Northwest Sports Complex in House Springs, MO
- Course Highlights: Beautiful scenery through the Big River bottoms, horse ranches, and countryside views.
New for 2026
- Finisher Medals: All participants will receive a finisher medal!
Course map
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