Mt. Hood National Forest · Oregon
Alder Flat
0.8 mi of trail, end to end · native material surface · trail No. 574 · trail class 3 · typical grade 12-20% · tread 18-24 inches wide
Trailhead Alder Flat Trailhead Drive there
Alder Flat Trailhead the Forest Service's write-up
No fees.
Trailhead for Alder Flat Trail #574 . Parking area has space for 4-5 vehicles with limited overflow
Restrictions See <a href="https://myodfw.com/fishing/willamette-zone">Oregon fishing regulations</a> for specific regulations governing fishing in the Clackamas River. <a href="https://myodfw.com/recreation-report/fishing-report/willamette-zone">Visit the Willamette Zone recreation report here.</a>
This trailhead on fs.usda.gov
Every trail in Mt. Hood National Forest
About this trail's facts
The lines are the US Forest Service's National Forest System trails layer (public domain), read 2026-10-16 and simplified for the map; the length is the line's, end to end, and the class, surface, grade and tread width are the forest's own entries where it publishes them - a forest that publishes the centreline alone has none. The trailheads and the points along the way are the Service's recreation points, and the write-ups its own recarea text, unedited. 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 forest's own site before you go.
