Charlotte Lake Trail

Overview

This is a big, rewarding Sierra day: up and over Kearsarge Pass from Onion Valley, then into the JMT/PCT corridor to serene Charlotte Lake. Expect superb granite basins, classic switchbacks, and a true high-country feel. The out-and-back is roughly 16–18 miles total with about 4,500 feet of cumulative gain, depending on the exact route you take. One-way to the lake is about 8–9 miles. It’s strenuous mostly because of altitude and total effort—not because of sketchy trail.

Route Highlights

From Onion Valley, the trail climbs past a string of alpine lakes to Kearsarge Pass (~11,700+ ft). West of the pass, you’ll drop quickly toward the Kearsarge/Bullfrog basin and reach a junction: one fork heads toward Kearsarge Lakes, the other toward Charlotte Lake. As you approach Charlotte, the final spur loses roughly 300 feet over about a mile to the far side of the lake. In this basin you’ll find big views, meadows, polished granite, and a quieter vibe than the pass itself. A seasonal ranger station sits near the lake.

There are two commonly used approaches after the pass: a higher line with broader basin views or a lower line that skims closer to the lakes—both are scenic. Trail work here is excellent, with well-graded switchbacks that keep the climb honest but manageable.

Difficulty, Conditions, and What to Expect

Altitude is the main challenge. The pass approaches 12,000 feet, and the effort adds up on the return. Start early, especially in summer; heat can creep into exposed sections even at elevation. Plan on carrying ample water (3+ liters per person in summer) and topping off from reliable sources along the way. Wildflowers often pop in mid-June. Mosquitoes are usually most noticeable in the evenings but vary by week.

If you continue beyond Charlotte toward Glen Pass as part of the Rae Lakes corridor, early-season snow can linger (the north side of Glen often holds it longer). Expect patchy snow near high passes in early summer, and consider traction if you’re pushing beyond Charlotte in June.

Camping, Regulations, and Bears

Charlotte Lake has designated camping areas and a seasonal ranger presence. A two-night maximum stay applies at the lake. Bears are active in this corridor—carry and properly use a bear-resistant canister. There are bear boxes toward the far end of Charlotte Lake, but do not rely on finding a free locker; come prepared with your own canister. Campfires are prohibited above 10,000 feet, which includes Charlotte Lake.

Overnight trips require a wilderness permit year-round, with entry quotas from around Memorial Day through late September. A portion of the quota is available for walk-up the day prior to departure, and the physical permit must be picked up from a ranger station before you hit the trail. Pets are not allowed on park trails. Stock is permitted, though grazing is restricted in certain areas. Note: No camping is allowed at Bullfrog Lake; camp at Kearsarge Lakes or at Charlotte instead.

Best Time to Hike

Mid to late summer is the sweet spot for most hikers. By then, the Kearsarge approach is typically clear, days are long, and the meadows are lively. For photography, morning light is kind to the pass ascent and evening light settles nicely on Charlotte’s granite backdrop. Aim for weekdays or early starts to stay ahead of crowds on this well-traveled corridor.