Siyeh Pass
What to Expect
Safety Advisory
Snow lingers on the north-facing approach well into July most years, creating steep, icy traverses with significant fall exposure. Microspikes are not optional — they're the difference between a hike and a rescue call.
This is prime grizzly habitat with limited sightlines in the lower meadow sections. Carry bear spray accessible on your chest or hip, not buried in your pack, and make noise on blind corners.
The upper route is fully exposed above treeline for over two miles with no shelter. Lightning storms build fast in the afternoon — if you see clouds stacking up over the peaks by noon, turn around.
Trail Details
Pro Tips
Run this as a point-to-point shuttle hike: start at Siyeh Bend on Going-to-the-Sun Road, climb over the pass, and descend to the Piegan Pass Trailhead — the descent side is more gradual and saves your knees roughly 1,200 feet of pounding.
Start before 8 AM to claim trailhead parking at either end along Going-to-the-Sun Road — by mid-morning in July and August, every pullout is full and the shuttle becomes your only option.
Bring a windbreaker even on bluebird days. The pass itself sits in a natural wind tunnel between peaks, and temperatures at the top can run 20 degrees cooler than the trailhead. Exposed ridgeline means zero shelter if weather rolls in.