Sixty Lake Basin via Onion Valley

The full route to Sixty Lake Basin and back is approximately 22.5 kilometers (14 miles) and typically takes around 8 hours and 11 minutes of moving time. However, due to its challenging nature and significant elevation gain, it's often recommended to spread the journey over two or three days to allow for altitude adjustment and to fully enjoy the scenery, especially if you plan to explore the basin itself.

No, the Sixty Lake Basin via Onion Valley trail is considered a difficult and expert route. It involves traversing two high Sierra passes, Kearsarge Pass (11,700 feet) and Glen Pass (approximately 11,900 feet), with substantial elevation gain. Hikers should be well-prepared for strenuous conditions and high-altitude trekking.

Yes, overnight trips into the John Muir Wilderness, which includes the Sixty Lake Basin area, require permits year-round. It's essential to secure these in advance, especially for popular entry points like Onion Valley. You can find more information and apply for permits through resources like recreation.gov. There are no entrance fees for the John Muir Wilderness itself, but permits are required for overnight stays.

The best seasons for hiking to Sixty Lake Basin via Onion Valley are typically mid-summer to fall. During these months, snow levels are generally lower on the high passes, and the weather is more stable. Early season (late spring/early summer) can still present significant snow challenges on Kearsarge Pass and Glen Pass.

The trail officially starts at the Onion Valley Trailhead. There is a large parking lot available at Onion Valley, but it can fill up quickly, especially during peak season. Arriving early in the morning is highly recommended to secure a spot.

You can expect dramatic high-alpine scenery throughout. The trail climbs immediately from Onion Valley, passing scenic mountain lakes like Gilbert Lake and Flower Lake. You'll quickly ascend above the timberline, traversing grand valleys, soaring granite peaks, and abundant alpine lakes and creeks. Sixty Lake Basin itself is a remote wonderland of alpine lakes scattered among low granite ridges, offering a truly rugged and intimate wilderness experience.

Yes, dogs are generally allowed in the John Muir Wilderness, including the Sixty Lake Basin trail, but they must be kept on a leash at all times. Please ensure you pack out all pet waste and follow Leave No Trace principles to protect the delicate alpine environment.

Along the route, you'll pass several stunning highlights. These include Gilbert Lake, Flower Lake, and Little Pothole Lake. You'll also cross the John Muir Wilderness Boundary and ascend to Kearsarge Pass, offering incredible vistas. Other viewpoints include Heart Lake Viewpoint, Big Pothole Lake Viewpoint, a general Sierra overlook, and a View of Bullfrog Lake.

Yes, after crossing Glen Pass, the trail connects with the famous John Muir Trail. Sections of this route also overlap with the Rae Lakes Loop, the Big SEKI Loop, and the PCT - California Section H, making it a gateway to longer backpacking adventures in the High Sierra.

Given the high-alpine and challenging nature of the route, essential gear includes sturdy hiking boots, layers of clothing for varying temperatures, rain gear, navigation tools (map, compass, GPS), sufficient water and purification methods, and high-energy food. Due to the presence of bears, a bear canister is required for all overnight trips in this area. Don't forget sunscreen, sunglasses, and a hat for sun protection at high altitudes.

The specific route 'Sixty Lake Basin via Onion Valley' as described is primarily an out-and-back to the basin. However, once you reach the John Muir Trail beyond Glen Pass, you have options to connect with other trails like the Rae Lakes Loop, allowing for longer loop itineraries if planned in advance.