Summit Lake Park is a park located along Mount Evans Scenic Byway about 64 miles (100 km) west of Denver, Colorado. The park is 160 acres (0.65 km²) in size and contains alpine tundra. Land to the east of the lake is in a state of permafrost which helps to prevent drainage of the area.^[2] During the summer, the park is filled with wildflowers, some of which have not been found anywhere else outside of the Arctic Circle.^[3] The park is named after Summit Lake, the headwaters of Bear Creek.

Summit Lake is a tarn which sits at 12,836 feet (3,912 m) elevation in a glacial cirque on the north face of Mount Blue Sky and the east face of Mount Spalding. To the north, there is a col (12,855 feet/3918 m elevation) looking down into the chain of two cirques holding the Chicago Lakes at the headwaters of Chicago Creek.^[4] By one count that includes several unnamed lakes, Summit Lake is the 13th highest lake in the United States.^[5] In 1915, the USGS reported that Summit Lake was the highest lake in Colorado, at 12,740 feet.^[6] Later secondary sources occasionally report it as the highest lake in the United States.^[7]

The land was acquired by Denver in 1924 and incorporated into the Denver Mountain Parks system.^[3] It was declared a National Natural Landmark in April, 1965.^[8]

• National Register of Historic Places listings in Clear Creek County, Colorado
• Echo Lake Park