The Oregon Half Marathon Calendar is a complete simplistic listing of Oregon half marathons. Currently the Oregon half marathon schedule has 2026 Oregon half marathons and 2027 Oregon half marathons as they roll in. Oregon half marathons 2026 & Oregon half marathons 2027 also identify trail half marathons and walker friendly half marathons by a (T) symbol and a (W) symbol.  The (T) means it is a TRUE trail half marathon 21k (off road, switchbacks, etc) and a (W) means it is truly "official walker friendly" requiring the half marathon to allow a minimum of 18:32 mile pace, minimum 4 hours for participants to finish the 13.1 mile distance.  If there is a (NWF) next to the date of a race, we have confirmed that the race is NOT walker friendly, meaning the race will NOT support the minimum official walker friendly standard of 4 hours for a walker / jogger / runner. We are working to get events updated.

The Oregon half marathon calendar features a complete listing of Portland half marathons, Eugene half marathons, Bend half marathons, Salem half marathons, Hillsboro half marathons, Medford half marathons, Corvallis half marathons, and many more 1/2 marathons in OR.

A half marathon is 13.1 miles (or in kilometers is a 21k). We understand sometimes there will be a slight margin of error up or down when runners run or walk any race distance, however our calendar only is a listing for true half marathons that do all they can to measure their course as an official half marathon 13.1 mile / 21k distance.  Races that are not 13.1 miles, we encourage not to call their race a 1/2 marathon to lessen confusion for runners & walkers looking to participate in a true 1/2 marathon distance. Some runners don't care, but you'd be surprised how many that do.