Trail Running calendar near Olallie Lake 2026-2027

A low-key series of Wednesday evening trail races in Portland's Forest Park with three five-race Series April to October, 4 to 7 mile hilly courses and Series standings.

A last person standing trail race on Hamilton Island in the Columbia River Gorge where runners repeat a 4.13 mile loop each hour and must finish each loop in under 60 minutes to continue until one runner remains.

The 34th Annual OXFORD Classic in Bend adds a Community 5K at Drake Park on 10/03/2026. The flat loop follows the Deschutes River on grass and paved paths and registration is free.

Mountain trail races on Mount Bachelor over October 3–4, 2026, including 6/12/24-hour summit loops and three looped courses. Chairlift use is included and multiple aid stations and lodge facilities support runners on alpine singletrack.

A 25K trail race in Corvallis OR on October 4 2026, part of the Corvallis Trail Series with proceeds supporting local trail work and rescue and shoe assistance programs.

An in-person and virtual event on October 4, 2026 in Gresham featuring a 5K, a kids dash for ages eight and under, and a virtual run/walk. Registration opens in April and fees vary by event.

Trail event in Rainbow, Oregon offering 20K and 50K courses with major climbs, multiple aid stations, shuttle service for the 50K, drop bag support, and post race food.

First annual 5K on October 10, 2026 at North Clackamas Park Complex in Milwaukie on a flat mostly paved course with proceeds supporting local nonprofits.

A low-key series of Wednesday evening trail races in Portland's Forest Park with three five-race Series April to October, 4 to 7 mile hilly courses and Series standings.

A three-day trail running event at Silver Falls State Park in Silverton, Oregon, offering distances from 5K to 50K. Registration opens Aug 1 and closes Oct 11, 2026, with fees that vary by race distance.

Looped 10 km course in St. Paul OR offering 50 mile, 50 km, 30K and a free kids 1K with aid stations, pacer rules, and inclusivity and deferral options.

A fall trail running weekend at Suttle Lake, Oregon featuring 24 hour, 12 hour and 6 hour timed races on a 3.6 mile loop, free on-site camping, provided food, and basic facilities with portable toilets.

A Halloween-themed race day at Pacific Community Park featuring youth and community 2k–5k courses on grass and compact trail, with medals and holiday prizes.

A low-key series of Wednesday evening trail races in Portland's Forest Park with three five-race Series April to October, 4 to 7 mile hilly courses and Series standings.

Trail races through Columbia River Gorge scenery with 25K point to point and a 50K loop, finishing at Marine Park in Cascade Locks.

A Halloween-themed ranch run near Sisters, Oregon with 5k, 5-mile, kids dash options, chip timing, costume contest, live music, and post-race non-alcoholic beverages.

Run The Rock in Smith Rock State Park near Bend Oregon features scenic loop trail races of 50K, 25K and a half marathon with significant elevation gain, single track sections, and aid stations.

A community fundraiser on the Klickitat Trail offering a half marathon and 5K along scenic canyon walls, with shuttle service, aid stations, and volunteer support.

The Ruff is a 7 mile trail race on Dog Mountain in Carson, WA with a 3 mile, 3000 ft climb and a 4 mile single track descent offering river and mountain views.

A community running event in Camas on December 19, 2026 offering a 5k and a 10K trail run with post-race cookies, cocoa and a giveaway beanie.