Marie Lakes, Thousand Island Lake via River Trail

Nestled in the heart of the Sierra Nevada, the trail to Marie Lakes and Thousand Island Lake via River Trail offers a captivating journey through some of California's most stunning landscapes. This out-and-back trail spans approximately 42 kilometers (about 26 miles) with an elevation gain of around 1,400 meters (4,600 feet), making it a moderately challenging adventure for hikers.

### Getting There

The trailhead is conveniently located near Madera County, California. For those traveling by car, the most accessible route is via Highway 395, turning onto Minaret Road (also known as Forest Route 3S25) towards the Agnew Meadows Trailhead. Parking is available at the trailhead, but it can fill up quickly during peak seasons, so an early start is recommended.

For those relying on public transport, the Eastern Sierra Transit Authority provides services to Mammoth Lakes, from where you can take a shuttle to the trailhead. Be sure to check the shuttle schedule in advance, as it operates seasonally.

### Trail Highlights

#### Agnew Meadows to Shadow Lake

The journey begins at Agnew Meadows, where the trail meanders through lush meadows and dense forests. As you progress, you'll encounter the serene Shadow Lake, approximately 6 kilometers (3.7 miles) from the start. This is a perfect spot to pause and take in the reflections of the surrounding peaks on the lake's surface.

#### Ascending to Garnet Lake

Continuing onward, the trail climbs steadily, offering panoramic views of the Ansel Adams Wilderness. At around 12 kilometers (7.5 miles) in, you'll reach Garnet Lake, a breathtaking alpine lake framed by rugged mountain peaks. The elevation gain here is noticeable, so take your time to acclimate and enjoy the scenery.

#### Thousand Island Lake

The crown jewel of this hike, Thousand Island Lake, is situated approximately 16 kilometers (10 miles) from the trailhead. Known for its numerous small islands scattered across its surface, the lake provides a stunning backdrop for photography and relaxation. The surrounding peaks, including Banner Peak, create a dramatic skyline that is particularly striking at sunrise and sunset.

#### Marie Lakes

For those continuing to Marie Lakes, the trail becomes more remote and less traveled. Located about 21 kilometers (13 miles) from the start, these lakes offer solitude and pristine natural beauty. The area is rich in wildlife, so keep an eye out for marmots, deer, and a variety of bird species.

### Historical Significance

The region is steeped in history, with the trail passing through areas once traversed by Native American tribes and later by European settlers. The Ansel Adams Wilderness, named after the famed photographer, is a testament to the area's enduring natural beauty and its importance in the conservation movement.

### Navigation and Safety

Given the trail's length and elevation changes, it's crucial to be well-prepared. Use HiiKER for accurate navigation and trail conditions. Weather in the Sierra Nevada can be unpredictable, so pack layers and be prepared for sudden changes. Water sources are available along the trail, but always treat water before drinking.

This trail offers a remarkable blend of natural beauty, challenging terrain, and historical intrigue, making it a must-visit for any avid hiker.