From the trailhead at Tour Stop #5, the Gambrill Mill Trail is a .5 mile loop through lowlands, the Dam Ruins Trail spur departs from a point about halfway around the loop. The Upper Gambrill Trail forms a 1.4 mile loop from the junction with the access road to a junction on the Dam Ruins Trail. ![]() NPS Trail info
Gambrill Mill Trails
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Last updated: August 21, 2023