In 44 days · Thu, Sep 24, 2026
Don't let race day sneak up
One email during race week. That's it.
Thursday, September 24th, 2026
5501 Hell's Gate Road, Lewiston ID
10K · Marathon · Half · 5K
54–74°F · low rain risk
See last 10 years
On this date: rain 1 of the last 10 years
2025
52–88°F
dry
2024
57–85°F
dry
2023
56–70°F
dry
2022
56–78°F
dry
2021
57–80°F
dry
2020
57–75°F
rain
2019
59–78°F
dry
2018
48–69°F
dry
2017
51–67°F
dry
2016
53–69°F
dry
Best months to race in Idaho →
About this race
Race Overview
World's Best Marathon & Half Series!
- No Time Limits: Enjoy the freedom to run at your own pace.
- Great Food: Savor delicious offerings post-race.
- Award-Winning Medals: Earn exceptional recognition for your efforts.
- Loony Community: Connect with passionate runners.
We RUN this country, TOGETHER!
Event Details and Schedule
Thanks for running with Mainly Marathons! Take a look at our website for additional details about this series and our other series of races. Take a look at the Northwest Series page to get details on each course.
Stay Connected
Also, join our Facebook group to stay up-to-date with our loony adventures: Main Group and Northwest Series Group.
Mainly Merch
If you're interested in some Mainly Merch, check out our online store HERE. We'll offer some items (hats, stickers, magnets, mugs, etc.) in-person at the races: however, the Mainly Merch store is the best option for a variety of fun designs and quality merchandise to showcase your loonacy!
Contact Information
If you have any questions, email MB@MainlyMarathons.com.
We RUN this country, TOGETHER!
Course map
Train with a club
Run clubs near Lewiston to train with before race day.
Suggested Races
Organize this race?
Claim it free to manage your listing — and get it featured for free, while spots last.