In 19 days · Wed, Sep 23, 2026
Don't let race day sneak up
One email during race week. That's it.
When
Wednesday, September 23rd, 2026
Where
5501 Hell's Gate Road, Lewiston ID
Distances
Half · Marathon · 5K · 10K
Typical weather
54–75°F · low rain risk
See last 10 years
On this date: rain 0 of the last 10 years
2025
48–79°F
dry
2024
56–81°F
dry
2023
47–73°F
dry
2022
51–74°F
dry
2021
55–76°F
dry
2020
60–83°F
dry
2019
58–72°F
dry
2018
51–69°F
dry
2017
48–64°F
dry
2016
53–70°F
dry
Best months to race in Idaho →
About this race
Event Overview
- Event Type: World's Best Marathon & Half Series!
- Time Limit: No Time Limits
- Food: Great Food
- Awards: Award-Winning Medals
Community Spirit
- Vibe: Loony Community!
- Message: We RUN this country, TOGETHER!
Event Details and Schedule
- Date: 2026-09-23
- Location: 5501 Hell's Gate Road, Lewiston, ID
- Registration: Register Here
- More Info: Check our website for additional details.
Stay Connected
- Join Us: Join our Facebook group to stay up-to-date with our loony adventures: Main Group
- Northwest Series: Join the Northwest Series Group.
Merchandise
- Online Store: Check out our online store HERE.
- In-Person Sales: We'll offer items (hats, stickers, magnets, mugs, etc.) at the races.
- Quality Merchandise: Best option for a variety of fun designs and quality merchandise to showcase your loonacy!
Contact Us
- Questions: If you have any questions, email MB@MainlyMarathons.com
Final Note
We RUN this country, TOGETHER!
Course map
Train with a club
Run clubs near Lewiston to train with before race day.
See all run clubs near Lewiston →
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