Mainly Marathons Northwest Series
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Northwest Series - September 18-23, 2027
The Northwest Series is a six day running series across three states: Oregon, Washington, and Idaho. Events are held over two days in each state with races staged in Hermiston, OR; Clarkston, WA; and Lewiston, ID. Daily races use looped courses on paved surfaces.
Distances available:
- Marathon (full)
- Half marathon
- 50K
- 10K
- 5K
Course highlights by location:
- Hermiston, OR (Oxbow Trail): smooth asphalt running/biking path, estimated elevation gain per lap 54 feet, tentative marathon laps 12.
- Clarkston, WA (Conference Center, 847 Port Way): smooth mix of asphalt, concrete, and pavement with little shade, estimated elevation gain per lap 33 feet, tentative marathon laps 14.
- Lewiston, ID (Hell’s Gate State Park): smooth asphalt with little to moderate shade, estimated elevation gain per lap 15 feet, tentative marathon laps 14.
Logistics and services: An optional early start is available for distances of half marathon or longer. Packet pickup includes a pre-series pickup on September 17 in Hermiston and race day pickup at each race location. The series uses a single, large aid station with a wide variety of food and drink options, including fruit, jelly beans, sandwiches, water, sports drink, hot coffee, and a mobile kitchen called Loony Lunchbox.
Other notes: The series follows a no runner left behind policy and generally has no time limit for the marathon and shorter distances, though participants must finish at least 30 minutes before park closing; the final day of the series has a 10 hour time limit. Walkers are welcome. Pets are not allowed; strollers are permitted. Discounts include a $10 reduction for active military and club members. Medals and shirts are awarded for each state race, with additional year, state, series finisher, and final-finisher (caboose) awards. Visit the organization's website for the most recent information.
