Northwest Series - Day 1 OR
The Northwest Series offers a flat, fast half-marathon in Hermiston, Oregon, with a welcoming community.
Race Date
Sep 19, 2026
Location
Hermiston, OR
Quick facts
- Date
- Saturday, September 19, 2026
- Location
- Hermiston, Oregon
- Distance
- Half marathon (13.1 mi) + 26.2M, 10K, 5K run
- Course
- Loop Course
- Terrain
- Road
- USATF certified
- Not listed
Highlights
Good For
Atmosphere
Course
The Experience
The Northwest Series, Day 1, takes place in Hermiston, Oregon, offering a flat and fast half-marathon course. This event is part of a larger series that spans the country, emphasizing a strong sense of community and a welcoming atmosphere for all runners.
The race is designed for speed, with minimal elevation change, making it an ideal setting for runners aiming for personal bests. The typical race-day weather in Hermiston, with temperatures ranging from the mid-50s to upper-70s, provides comfortable running conditions for participants.
Organized by Mainly Marathons, this event is known for its "Loony Community" and focus on a positive race experience. Runners can expect award-winning medals and great food at the finish, contributing to a festive atmosphere that celebrates the accomplishment of completing the half-marathon.
Race-provided description
World's Best Marathon & Half Series!
No Time Limits
Great Food
Award-Winning Medals
Loony Community!
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.
Also, join our Facebook group to stay up-to-date with our loony adventures: Main Group and Northwest Series Group.
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, the Mainly Merch store best option for a variety of fun designs and quality merchandise to showcase your loonacy!
If you have any questions, email MB@MainlyMarathons.com
We RUN this country, TOGETHER!
Course Info
Course Type
Loop Course
Terrain
road
Surface
Paved
Difficulty
Ultra-Flat
Net Drop/km
0 m (Flat)
Separation
0.0%
Also Offers
Quality Score
first year
no finisher counts yet
small race — neutral
needs a few years of results
4 timing sources · 5 photos
no finisher data yet
no winner time yet
typical high 78°F
Race Day Weather
5-year historical avgStart (Low)
54°
Afternoon (High)
78°
Warm — hydration strategy is key, start conservatively
0.0"
Precipitation
11 mph
Wind
48%
Humidity
Race Photos
Frequently asked
When is the Northwest Series - Day 1 OR?
The Northwest Series - Day 1 OR is held on Saturday, September 19, 2026.
Where does the Northwest Series - Day 1 OR take place?
It takes place in Hermiston, Oregon.
What distances does the Northwest Series - Day 1 OR offer?
The half marathon (13.1 miles), plus 26.2M, 10K, 5K run.
Is the Northwest Series - Day 1 OR course flat and good for a PR?
The Northwest Series - Day 1 OR is a ultra-flat, loop course course.
HalfRuns editorial — independent, no paid placement.
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