Boundary Creek Trail

This reflects the 10Adventures difficulty rating for each route. We aim to keep ratings consistent across regions.
This reflects the estimated time the majority of users will take on this trail. If you are slower, add time to the top-end figure. If you are fast, then you may complete this route faster than this time range.
This reflects the return distance of this route as measured by the GPS file.
18.3 km
This reflects the total elevation gained throughout this route as measured by the GPS file. This includes all ascents and descents, and is higher than what is quoted in most route guides, which simply measure the distance between the starting-point and high-point of the route.
1,163 m
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Directions to Trailhead

The Boundary Creek Trail boasts a relentless climb, but it reveals some of the greatest views of the Sawtooth Mountain Range, so who are we to complain? Those seeking a high-effort, high-reward type of adventure have come to the right place.

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Route Description for Boundary Creek Trail

Immerse yourself in Idaho’s mountains as you tackle the Boundary Creek Hike. This arduous ascent is a calve-burner and will undoubtedly get your heart rate up, but the views from the ridgeline are well worth the sweat. As this route travels through exposed terrain up to high altitudes, it is important to be mindful of the weather. Head up in the early morning to mitigate the chances of getting caught in an afternoon lightning storm on the crest, and make sure to dress in layers as insurance against changing conditions. Whatever you do, don’t forget your camera; the scenery is spellbinding.

Setting out from the trailhead, the Boundary Creek Trail travels northeastwardly, immediately climbing alongside the creek. The initial section of the trek will progress through an exposed meadow before escaping beneath the tree canopy for a brief retreat from the sun. As you gain the ridge, the path will gently switch back, alternating through exposed and shaded areas. After a tireless ascent, you will summit the exposed ridgeline; turn right onto the Sunny Gulch Trail here. Take the time to indulge in the panoramic views of the snow-capped Sawtooth Mountains dominating the skyline and Redfish Lake below. If time permits, continue hiking along the Sunny Gulch Trail to the intersection with the Martin-Big Casino Trail.

Turn left, and you will descend into a basin decorated with the Casino Lakes and the Big Casino Creek. Refresh your water supply, then head back the way you came, all the way to the trailhead.

Getting to the Boundary Creek Trail Trailhead

The Boundary Creek Trail is accessed from the dirt road off State Highway 75.

Route Information

  • Backcountry Campground

    Dispersed Camping

  • When to do


  • Pets allowed

    Yes - On Leash

  • Family friendly


  • Route Signage


  • Crowd Levels


  • Route Type

    Out and back

Boundary Creek Trail Elevation Graph

Weather Forecast

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Boundary Creek Trail Reviews

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