Yosemite National Park

Ostrander Lake

strenuous Solitude SeekersExperienced HikersBackcountry Lakes
12 mi Distance
1,500 ft Elevation Gain
Varies Estimated Time
roundtrip Trail Type

What to Expect

The first couple miles lull you into complacency — gentle forest walking through red fir and lodgepole pine, the kind of trail where you forget you signed up for something strenuous. Then the climbing starts in earnest, switchbacking up through granite slabs and thinning trees where Mount Starr King and the sawtooth Clark Range suddenly fill the horizon. The middle stretch crosses open meadows that explode with lupine and paintbrush in midsummer. By the time you crest Horizon Ridge, your quads will have logged a solid fifteen-hundred feet of vertical, but the alpine lake sitting in its granite bowl makes the argument that it was all worth it. Ostrander Hut, a stone ski cabin on the shore, adds a backcountry-outpost vibe you won't find at most Yosemite day hikes. This one rewards hikers who like earning their views the hard way.
Solitude SeekersExperienced HikersBackcountry LakesPhotographersSki Touring

Safety Advisory

Snow lingers on the upper trail and Horizon Ridge well into June most years — without microspikes and a GPS track, route-finding through snowfields is genuinely difficult and disorienting.

Afternoon thunderstorms build fast over the Clark Range in July and August. The exposed granite slabs above treeline are the last place you want to be when lightning starts — watch the sky and turn back if cumulus towers start stacking by early afternoon.

Trail Details

Distance 12 miles round-trip
Elevation Gain 1,500 ft
Difficulty strenuous
Estimated Time Varies
Trail Type roundtrip
Pets Not allowed
Season Year-round
Trailhead Ostrander Lake

Pro Tips

Trail Tip

Start from the Badger Pass ski area trailhead by 8 AM — the exposed granite sections on the back half bake in afternoon sun, and the twelve-mile round trip needs a full day at a comfortable pace.

Trail Tip

There is no reliable water between the trailhead and the lake itself, so carry at least three liters per person. The creek crossings marked on older maps can be bone dry by August.

Trail Tip

The view from the granite knoll just east of Ostrander Hut is better than the one from the shore — scramble up for an unobstructed panorama of the Clark Range reflected in the lake, especially in the hour before sunset.

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