Horseshoe Lake – Lake Mary loop from Mammoth Lakes

If you're looking for a challenging yet incredibly rewarding touring cycling experience in the Eastern Sierra, the Horseshoe Lake – Lake Mary loop from Mammoth Lakes is a difficult 16.8-mile (27.0 km) route that packs in 1496 feet (456 metres) of climbing over an estimated 2 hours and 7 minutes. This popular trail is perfect for cyclists with good fitness who are ready to tackle sustained climbs and high-altitude riding for spectacular alpine views.

What to expect on Horseshoe Lake – Lake Mary loop from Mammoth Lakes

The journey begins with a sustained climb up the Lakes Basin Path, winding through extensive pine forests. As you ascend, you'll be treated to stunning views of granite peaks and a series of beautiful alpine lakes, including Twin Lakes, Lake Mamie, and the dramatically situated Lake Mary, nestled against a red basalt cliff. The route then flattens and becomes more winding towards Horseshoe Lake, where you can even take a refreshing swim. Be prepared for the high altitude, as Mammoth Lakes sits at 7,800 feet, making the 1496 feet (456 metres) of elevation gain feel more demanding, but the car-free sections and panoramic viewpoints make the effort worthwhile for experienced touring cyclists.

Planning your visit

The high altitude of Mammoth Lakes, starting at 7,800 feet and reaching around 8,900 feet, means physical exertion can be more demanding, especially for those not accustomed to it. While the Lakes Basin Path offers largely car-free sections, the initial climb from the Village at Mammoth is sustained. The Horseshoe Lake loop segment itself is a short, easy option for families, but the full loop requires good fitness. Always check local conditions, especially for seasonal considerations, as weather can change quickly in the mountains.

Trail details

• Distance: 16.8 miles (27.0 km)
• Elevation gain: 1496 feet (456 metres)
• Difficulty: difficult
• Estimated time: 2 hours and 7 minutes