Columbia National Wildlife Refuge · Washington

Marsh Loop Trail

1.2 mi of trail, end to end · about 20 ft of climbing · 864 ft–883 ft · gravel surface · trail No. T202 · trail class 2 (moderately developed) · condition: marginally functional · slope 4% on average, 12% at most · tread 8 ft wide · hiking · seasonal: Hiker/Pedestrian = 03/01-09/30

864 ft 883 ft · 1.1 mi high 883 ft

Begins Rimrock Trail, 46.9374, -119.2421 · ends: Rimrock Trail - no trailhead mapped Drive to where the trail begins

Hike this trail · Every trail in Columbia National Wildlife Refuge

Hike this trailAll 5 trails in Columbia National Wildlife RefugeFind a trailRefuge on fws.gov

About this trail's facts

The lines are the US Fish and Wildlife Service's refuge trails inventory (public domain), read 2026-10-16 and simplified for the map; the length is the Service's trail mileage where it gives one, else the sections' sum; the surface, class, condition, uses, width, slope, dogs, bicycles and accessibility are the Service's own entries, and where a trail begins is the Service's own start point and words for it. The Service publishes no trailhead points for the refuges. Heights come from USGS 3DEP through Terrain Tiles on AWS (Mapzen/Tilezen), read along each line and rounded; a short trail on steep ground can be off by a few tens of feet. Closures change: check the refuge's own site before you go.