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2026 Northwest Series - Day 3 (WA)

Name: 2026 Northwest Series - Day 3 (WA)
Start: 2026-09-21
End: 2026-09-22
Location: Clarkston

Clarkston, Washington, United States

calendar_today 21 Sep, 2026 – 22 Sep, 2026

directions_run Running

language Official Website

sell $65.00 – $175.00

About the Event

World's Best Marathon & Half Series!

No Time Limits

Great Food

Award-Winning Medals

Loony Community!

We RUN this country, TOGETHER!

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!

Races Offered

10K - Individual Age group/open

Sep 21, 2026

straighten

Distance — 10K

terrain

Type — Running

timer

19 days remaining

sell

$75.00

50K - Individual Age group/open

Sep 21, 2026

straighten

Distance — 50K

terrain

Type — Running

timer

19 days remaining

sell

$175.00

5K - Individual Age group/open

Sep 21, 2026

straighten

Distance — 5K

terrain

Type — Running

timer

19 days remaining

sell

$65.00

Half Marathon - Individual Age group/open

Sep 21, 2026

straighten

Distance — 21.1K

terrain

Type — Running

timer

19 days remaining

sell

$145.00

Marathon - Individual Age group/open

Sep 21, 2026

straighten

Distance — 42.2K

terrain

Type — Running

timer

19 days remaining

sell

$165.00

Weather History

These values represent the 3-year monthly averages for September in Clarkston.

thermostat Temperature

15.2° / 27.5°

wb_sunny Feels like

14.5° / 26.2°

light_mode Avg sunshine hours

10h 18m

water_drop Avg rainfall

0.7 mm

ac_unit Avg snowfall

—

air Avg wind speed

4.7 km/h (Light breeze)

opacity Sweat loss rate

High

terrain Course conditions

Hard and dry surface

sunny Max UV Index

Moderate (3.5)

humidity_mid Humidity

52.2%

wb_twilight Sunrise

06:26

nightlight Sunset

18:57

About Clarkston

Learn more about the host city, Clarkston.

Clarkston is a city in Asotin County, Washington, United States. It is part of the Lewiston–Clarkston, ID-WA metropolitan area, and is located west of Lewiston, Idaho, across the Snake River. The population was 7,161 at the 2020 census, and was estimated at 7,138 in 2024. Clarkston's ZIP Code, 99403, is the highest numerically in the contiguous United States.