Siyeh Pass Trail

Siyeh Pass Trail is a 10-mile point-to-point hike from the Piegan Pass Trailhead at Siyeh Bend to Sunrift Gorge. It climbs to a high divide above Preston Park, then descends the long Baring Creek valley with Sexton Glacier across the slopes. Expect a very challenging day: about 2,300 feet up and 3,400 feet down, with roughly 6 to 8 hours on foot. The scenery changes from forest to meadow to open alpine country, but you need a shuttle or a vehicle pickup at the far end. This is the full crossing, not the shorter hike that turns around at the pass.

Start at the Piegan Pass Trailhead on Going-to-the-Sun Road and finish at Sunrift Gorge. The park shuttle can return you to the start when it is operating; check its service and have a backup transfer plan before setting out. Parking at Siyeh Bend is limited during peak summer. The high route and its road access are seasonal, and lingering snow can block the crossing. Check current trail and road status. Dogs are not allowed on park trails.

The climb starts in forest and opens into Preston Park, an alpine meadow with a stream and wildflowers. This is a good place to pause before the harder part. Views build toward Piegan Mountain, Mount Siyeh and the surrounding peaks. The trail then climbs more steeply toward the divide; the footing gets rocky and loose, and the switchbacks make the elevation gain feel continuous. Several hikers say this ascent takes more effort than they expected, so keep a steady pace and save some energy for the long descent.

The pass opens onto the Boulder Drainage and a wide spread of high peaks. Look for Matahpi Peak and Going-to-the-Sun Mountain above Baring Creek Valley, with Sexton Glacier tucked beneath Matahpi's eastern slopes. Little Chief Mountain stands farther south. For a photo, include the near ridge or a snowfield with the valley and its small lakes; the foreground makes the drop and scale easier to read than a frame aimed only at the distant skyline.

Beyond the divide, the route drops through open alpine slopes. Waterfalls appear below Sexton Glacier, then the trail reaches the valley floor and follows Baring Creek toward Sunrift Gorge. The high country gives way to more wooded terrain near the finish. This is a long downhill after a strenuous climb, so tired legs still have work to do. The combination of a steep ascent and an even longer descent is the main tradeoff of doing the crossing in one day.

The route is difficult because it stays demanding for miles: a sustained climb, rough upper footing, and a long descent add up to more than the distance alone suggests. Visitors repeatedly praise the change in scenery and glacier views, but also describe the climb as strenuous. Carry a warm layer for the exposed high ground, and avoid starting late; a shuttle return adds another moving part to an already long day.

You can hike 4.6 miles one way from Siyeh Bend to Siyeh Pass and retrace the route for a 9.2-mile out-and-back, with about 2,362 feet gained. It is still a very hard hike and only slightly shorter than the crossing, but it avoids the long descent to Sunrift Gorge and the shuttle transfer. Choose it when you want the pass view and prefer to return over familiar ground.