Conness Glacier, Alpine glacier in Sierra Nevada, California.

Conness Glacier is an alpine glacier in the Sierra Nevada, sitting on the northeast face of Mount Conness at around 11,500 feet (3,500 m) elevation. The ice covers steep slopes and broken rocky terrain, with visible crevasses running across its surface.

Conness Glacier lies on the steep northeast cirque of Mount Conness, east of the Sierra Nevada crest, at about 11,548 feet (3,520 m). It is the largest glacier in the Sierra Nevada north of Tioga Pass or Highway 120, and it can be seen from Saddlebag Lake to the east.

Research teams visit the glacier regularly to document changes in the ice across different seasons. The data collected here feeds into broader climate studies, making it a reference point for scientists around the world.

The glacier is reached by hiking trails from Saddlebag Lake, so sturdy footwear and time to adjust to the altitude are both necessary. Mountain weather can shift quickly at this height, so bring warm layers regardless of the forecast.

The Conness Glacier is considered the largest ice mass north of Tioga Pass in the Sierra Nevada. Despite its shrinking size over the decades, it still draws climbers attempting the northeast face of Mount Conness, who cross the ice as part of their route.