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2026 Northwest Series - Day 5 (ID)

Name: 2026 Northwest Series - Day 5 (ID)
Start: 2026-09-23
End: 2026-09-24
Location: Lewiston

Lewiston, Idaho, United States

calendar_today 23 Sep, 2026 – 24 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 23, 2026

straighten

Distance — 10K

terrain

Type — Running

timer

21 days remaining

sell

$75.00

50K - Individual Age group/open

Sep 23, 2026

straighten

Distance — 50K

terrain

Type — Running

timer

21 days remaining

sell

$175.00

5K - Individual Age group/open

Sep 23, 2026

straighten

Distance — 5K

terrain

Type — Running

timer

21 days remaining

sell

$65.00

Half Marathon - Individual Age group/open

Sep 23, 2026

straighten

Distance — 21.1K

terrain

Type — Running

timer

21 days remaining

sell

$145.00

Marathon - Individual Age group/open

Sep 23, 2026

straighten

Distance — 42.2K

terrain

Type — Running

timer

21 days remaining

sell

$165.00

Weather History

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

thermostat Temperature

15.3° / 27.6°

wb_sunny Feels like

14.6° / 26.3°

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 Lewiston

Learn more about the host city, Lewiston.

Lewiston is a city in and the county seat of Nez Perce County, Idaho, United States, in the state's north central region. It is the third-largest city in the northern Idaho region, behind Post Falls and Coeur d'Alene, and the twelfth-largest in the state. Lewiston is the principal city of the Lewiston, ID-WA Metropolitan Statistical Area, which includes all of Nez Perce County and Asotin County, Washington. As of the 2020 census, the population of Lewiston was 34,203, up from 31,894 in 2010.