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Oregon Half Marathons in October

This is the calendar of all the Oregon half marathons in October. On these race calendars, not only will you be able to search the basics of cities and dates, but you’ll also be able to find October Oregon half marathons by difficulty, scenery, race size, and attributes like whether it’s pet-friendly, stroller-friendly, or has a great finisher party.

If you can’t find the half marathon you’re looking for in Oregon in October, it’s possible the race has not updated their date to the current year or has switched months. If you know a race belongs on this calendar or have any edits you’d like to suggest for an existing race in Oregon in October, you can email us [email protected].

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October 4, 2026
1,000-10,000 runners
Portland, Oregon

Running in Oregon

FAQ

What are the most popular Oregon half marathons?

The Portland Half Marathon is the most popular half marathon with 3,782 finishers. The second most popular is the Eugene Half Marathon with 3,121 finishers in 2023, followed by the Shamrock Run Portland with 1,732 finishers.

What are the best Oregon half marathons for beginners in 2025?

The Oregon half marathons we recommend as the best for beginners most frequently are:

The Shamrock Run Portland: Portland’s longest running St. Patrick’s Day tradition with over 25,000 runners participating across all distances. The massive crowds make this a festive environment and the finisher’s party has a green beer garden and live music.
Eugene Marathon: We love the course from Eugene to Springfield, alongside the Willamette River, and on the same roads that have been run for over 50 years. Most notable – the finish at historic Hayward Field, the University of Oregon track, home to iconic runners like Steve Prefontaine and Bill Bowerman of Nike.
Columbia Gorge Half Marathon: A 7-hour cut off time with beautiful fall foliage alongside the Columbia River.
Which months can I run a half marathon in Oregon?

You can run a half marathon in Oregon in May, June, July, August, September, October, November, and December.

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