An out-and-back route from a roadside trailhead descends steeply into a canyon, then follows a creek upstream to the Subway, a narrow tunnel-shaped section carved by erosion. Most of the way has no marked trail, with boulder scrambling, river crossings and wading in cool water.
Highlights
- Steep descent into canyon
- Creek crossings and boulders
- Subway tunnel and waterfalls
Good to know
- Permit required, via lottery or visitor center
- About 9 miles round trip, 8-10 hours
- Small parking lot, arrive early
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