Trail running course through singletrack trails in Washington, USA
Grand Ridge

Grand Ridge — Marathon

Marathon·6,660 ft gain·Issaquah, Washington
foresttechnicaltrailloopmarathonbeginner friendly

AI-generated image

DistanceMarathon
Gain6,660 ft
DateNov 7, 2026
Difficulty2/5

About This Race

The marathon distance strikes a balance between substantial challenge and achievable goals for experienced trail runners. This 26.2-mile journey provides ample time to settle into a rhythm while exploring the varied landscape that defines the Grand Ridge experience. The course demands respect but rewards runners with a thorough tour of the trail system.

The race utilizes two distinct loops: a 5-mile loop and a longer half-marathon loop of approximately 14 miles. All distances begin at the Highpoint Way Trailhead, following the Issaquah-Preston Trail for 0.5 miles before ascending rocky, technical switchbacks to the course junction. The longer distances continue up Grand Ridge with a detour to the Flowing Fir Trail before reaching the Duthie Aid Station. Marathon runners complete two half-marathon loops, while 50K runners tackle two half-marathon loops plus the 5-mile loop. The trails remain open to other users including pedestrians and cyclists during the event.

Elevation Profile

Elevation profile estimated from terrain data. Actual course may differ.

The course gains 6,660 ft over 26 miles, with the steepest section between mile 24–mile 24.

Location

Practical Info

Weather

November conditions in the Pacific Northwest typically feature cool temperatures, high humidity, and potential rain with vibrant fall foliage.

Required Gear
  • Refillable water container

Best For

Trail running enthusiastsRunners seeking fall sceneryMulti-distance event participants

Notable Features

This cupless race serves as the Evergreen Trail Runs series finale where series awards are distributed. The event showcases the extensive trail network built by the Washington Trails Association in the heart of the Cascade foothills, featuring the region's signature moss-covered forests and fern understories. The race acknowledges its location on Indigenous Coast Salish lands, specifically the Snoqualmie Indian Tribe territory.

Other Distances at This Event

5 Miles

2,274 ft gain

The race utilizes two distinct loops: a 5-mile loop and a longer half-marathon loop of approximately 14 miles. All distances begin at the Highpoint Way Trailhead, following the Issaquah-Preston Trail for 0.5 miles before ascending rocky, technical switchbacks to the course junction. The longer distances continue up Grand Ridge with a detour to the Flowing Fir Trail before reaching the Duthie Aid Station. Marathon runners complete two half-marathon loops, while 50K runners tackle two half-marathon loops plus the 5-mile loop. The trails remain open to other users including pedestrians and cyclists during the event.

Half Marathon

3,927 ft gain

The race utilizes two distinct loops: a 5-mile loop and a longer half-marathon loop of approximately 14 miles. All distances begin at the Highpoint Way Trailhead, following the Issaquah-Preston Trail for 0.5 miles before ascending rocky, technical switchbacks to the course junction. The longer distances continue up Grand Ridge with a detour to the Flowing Fir Trail before reaching the Duthie Aid Station. Marathon runners complete two half-marathon loops, while 50K runners tackle two half-marathon loops plus the 5-mile loop. The trails remain open to other users including pedestrians and cyclists during the event.

50K

5,791 ft gain

The race utilizes two distinct loops: a 5-mile loop and a longer half-marathon loop of approximately 14 miles. All distances begin at the Highpoint Way Trailhead, following the Issaquah-Preston Trail for 0.5 miles before ascending rocky, technical switchbacks to the course junction. The longer distances continue up Grand Ridge with a detour to the Flowing Fir Trail before reaching the Duthie Aid Station. Marathon runners complete two half-marathon loops, while 50K runners tackle two half-marathon loops plus the 5-mile loop. The trails remain open to other users including pedestrians and cyclists during the event.