Oxbow Trail Runs

APR
26
2026
Experience the beauty of the Sandy River and Ancient Forest at the Oxbow Trail Runs near Portland. Choose from 5k, 10k, or Half Marathon distances in a scenic regional park for a day of nature and community.
Sun 26 Apr 2026
Half Marathon 10 kilometers 5 kilometers

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Event Overview

The Oxbow Trail Runs take place in the scenic Oxbow Regional Park, a Metro-managed area located outside Gresham on the Sandy River. Situated approximately 30 minutes from downtown Portland, this location features the park's Ancient Forest, elk meadows, and riverfront trails.

Distances and Course Routes

The event offers three distinct trail distances, all starting and finishing at the Alder Picnic Area:

  • 5k: A reasonably flat course that winds through the Ancient Forest and along the Sandy River, offering views of the river's oxbow bend and surrounding foothills.
  • 10k: This route follows the initial mile of the 5k before climbing to Alder Ridge. It circles Elk Meadow, featuring views of Mt. Hood on clear days. The course includes a 300-foot climb on an equestrian trail followed by a descent over stairs and roots.
  • Half Marathon: Consists of two 10k loops with an additional one-mile section through the Ancient Forest and river trails. The total elevation gain for this distance is 1560 feet.

Participant Information

The event is cupless, meaning participants must bring their own hydration vessels. Aid stations with water and electrolytes are available at various points for the 10k and Half Marathon. Registered participants receive post-race food and a cup for root beer floats. The venue includes horseshoe pits, play structures, and beach access.

Parking is available at the Alder Picnic Area. Please note that pets, alcohol, and smoking or vaping are prohibited within Oxbow Regional Park to protect the sensitive habitat. Visit the organization's website for the most recent information.

Half Marathon
Half Marathon
10 km
10k
5 km
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