Kearsarge Pass Trail

Overview

This is a quintessential High Sierra climb from Onion Valley to Kearsarge Pass, with payoff views that punch way above the mileage. Expect steady switchbacks, increasingly rocky tread, and little shade as you climb past a string of turquoise lakes—Little Pothole, Big Pothole, Gilbert, Flower, and Heart—toward granite walls and jagged pinnacles. The out-and-back to Kearsarge Pass is roughly 9–9.6 miles total with about 2,400–2,600 feet of gain. If you drop over the pass toward Kearsarge or Bullfrog Lakes inside Kings Canyon, you’re looking at about 12.4 miles total and roughly 3,490 feet of cumulative gain.

What You’ll See

It’s classic alpine: glacially carved basins, granitic slabs, and the dramatic Kearsarge Pinnacles dominating the skyline. Big Pothole Lake sits in a steep-walled bowl below the trail; Flower Lake is a popular on-route water stop. From the pass (around 11,700+ feet), views explode west into Kings Canyon’s basins and east down to the Owens Valley. Vegetation thins with elevation, making the upper miles feel stark and wide open.

Difficulty and Trail Feel

The grade is steady and the altitude is the real hurdle. Starting near 9,100 feet means many hikers feel it early; the final approach is rocky and exposed but non-technical. Plan about 5–6 hours for the pass out-and-back, or around 7 hours if you continue to the lakes beyond.

Best Time to Hike

Typical season runs May–October, with snow dictating the edges. Start early for cooler temps, calmer winds, and kinder light on the lakes. Shoulder seasons can bring lingering snow/ice—light traction may be warranted. Summer brings more people and stronger sun; mornings and weekdays help with both crowds and heat.

Logistics and Regulations

Trailhead parking is at Onion Valley at the road’s end above Independence; it’s popular—arrive early. There are no facilities on the trail; carry what you need and treat any lake/stream water. Day hikes don’t require a wilderness permit, but any overnight trip does; permits are issued through Inyo National Forest (reserve in advance—quotas apply). Dogs are allowed on the Inyo National Forest side up to the pass, but they are not allowed once you cross into Kings Canyon National Park.

Safety and Tips

• Altitude: pace yourself, hydrate, bring electrolytes, and consider a pre-hike night at Onion Valley Campground if you’re not acclimated.
• Exposure: minimal shade and often windy at the pass—sun protection and an extra layer are smart.
• Surface: increasingly rocky higher up; good footwear matters.
• Overnights: bear canisters are required for food storage; campfires are generally not permitted above 10,000 feet. Cell service is spotty to nonexistent.

Who Will Love It

If you’re after maximum alpine scenery for the miles, this is your move. It’s also a prime gateway into longer trips, including links to the John Muir Trail corridor and the Rae Lakes area. If all you want is an easy lakeside stroll, this steady, high-altitude climb will feel like work—beautiful work, but still work.