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Mainly Marathons Northwest Series

Name: Mainly Marathons Northwest Series
Start: 2026-09-23
End: 2026-09-23
Location: Lewiston

Lewiston, United States • 23 Sep 2026

2026 Northwest Series - Day 5 (Lewiston, ID)

The event takes place on September 23, 2026 at Hell's Gate State Park in Lewiston, Idaho. The park address is 5501 Hell's Gate Road, Lewiston, ID 83501.

Distances offered include:

Marathon
Half Marathon
50K
10K
5K

Entry fees listed for each distance are: Marathon USD 145, Half Marathon USD 125, 50K USD 155, 10K USD 65, and 5K USD 55. A course map is noted as available.

The event listing indicates there are no time limits. Medals are listed as award items and food is mentioned as available. Merchandise items such as hats, stickers, magnets and mugs may be offered in person at the races, and an online store is noted as an additional option.

The event is organized by Mainly Marathons. A series of Northwest races is referenced as part of the organizer's event lineup. Visit the organization's website for the most recent information.

United States Idaho Lewiston

Race information

Website Registration

50 km

50k

Marathon

Half Marathon

10 km

10k

5 km

Visit the organization's website for the most recent information.

Trail runs nearby

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10 km

The Rose Creek 10k is part of the Palouse Road Runners summer series on May 9, 2026, featuring a single loop on gravel roads near Albion, WA and the Rose Creek Nature Preserve; most series registrations are free and donations are welcome.

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Prr Summer Series 10k - Headwaters

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A community 10k on Moscow Mountain via the Headwaters Trailhead, just over 5 miles with about 700 ft of climbing. The run is free with donations welcome, followed later by Camp Moscowanna, a summer camp themed block party in downtown Moscow..

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Blue Mountain Bash

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Saturday Jul 11

Donut Dash 10k - Moscow, ID

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10 km

A 10 km solo and 10 km relay in Moscow, ID with six loops and a box of six donuts per team; runners eat one donut before each loop on PCEI trails. Leave no trace rules apply and registration closes July 9.