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Fallen Leaf Lake

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Fallen Leaf Lake

Fallen Leaf Lake is a mountain lake located in El Dorado County, California, near the CaliforniaNevada state line, about one mile south west of the much larger Lake Tahoe. It is approximately aligned north-to-south and oval in shape, measuring approximately 2.9 miles (4.6 km) on the long axis and 0.9 miles (1.4 km) on the short axis. The lake was created by at least two glaciers that traveled northward down the Glen Alpine Valley. If the glacier had continued instead of stopping, Fallen Leaf Lake would be a bay of Lake Tahoe, similar to nearby Emerald Bay. A terminal moraine is visible at the north end of the lake on the northeast edge.

Fallen Leaf Lake is located within the National Forest System lands managed by the Lake Tahoe Basin Management Unit, adjacent to El Dorado County. The land surrounding the lake is privately owned, leased from the U.S. Forest Service, and part of the Lake Tahoe Basin Management Unit. Like some areas where the Forest Service has leased land intermingled with private land, the two land types appear in a mosaic or checkerboard pattern.

Fallen Leaf Road is approximately 5 miles (8 km) long, and begins at State Route 89, which runs along the south shore of Lake Tahoe. The road intersects the highway approximately half a mile (800 m) west of Camp Richardson, a resort and campground on the southern shore of Lake Tahoe. The road runs generally to the south, is one lane wide and paved, and has turnouts to allow cars to pass each other. The road passes the Fallen Leaf Lake Campground, operated by the Forest Service, and then past privately owned meadows. Two miles south of State Route 89, Angora Road provides access to Angora Lookout, a Forest Service fire lookout on the east side of the lake and approximately 1,000 feet (300 m) above the lake's surface, and to Angora Lakes Resort. It also connects to US 50/SR 89 via Sawmill Road.

Fallen Leaf Road continues south past privately owned homes following the lakeshore. Emigrant Road connects to Fallen Leaf Road approximately three miles from SR 89, and provides access to houses above the lake on the eastern slope. There is little commercial development at the lake other than the tiny Fallen Leaf Marina and Store at the southern extremity of the lake. The road winds around the south end of the lake, past St. Francis of the Mountains, an Episcopalian chapel, and then across a concrete bridge spanning Glen Alpine Creek. Glen Alpine Road begins at the bridge and runs for about two miles southwest to Glen Alpine Springs, one of the trailheads to the Desolation Wilderness Area. Fallen Leaf Road itself continues northwesterly along the west side of the lake past the Stanford Sierra Camp.

Cathedral Road also intersects State Route 89, and travels south to the houses on the west side of the lake. While it runs to within about three-quarters of a mile (1.2 km) of Fallen Leaf Road, the two roads do not connect. Some of the homes on the west side of the lake have no road access and are accessed on foot or by boat.

Fallen Leaf Lake is fed almost entirely by Glen Alpine Creek at the south end, which is in turn fed by several lakes in the Desolation Wilderness area including Gilmore Lake, Susie Lake, Heather Lake, and Grass Lake. In the spring, melting snow causes a vigorous flow of cold water into the lake which gradually tapers off during the summer months until the creek flow is greatly reduced in late summer and the fall. Other much smaller creeks and streams feed the lake, including Cathedral Creek, but they are not nearly as important as Glen Alpine Creek.

Taylor Creek is the only outflow, and it is controlled by a long, low concrete dam with an adjustable spillway to control the rate at which the water leaves the lake. This dam is 12 ft (3.7 m) high and 265 ft (81 m) in length. Taylor Creek flows northward, passing under State Route 89, and enters Lake Tahoe at Baldwin Beach.

Fallen Leaf is approximately 381 feet (116 m) deep at its deepest point, which is at the south end, east of the sheer face of Mount Tallac and north of Stanford Sierra Camp. The average depth of the lake is around 240 feet (72 m), and the bottom falls away rapidly as one moves away from the shorelines at the southern end. Due to the action of the glaciers that carved the lake, the northern end of the lake has a much more gradual depth change, and the bottom can be seen from the surface for a quarter-mile (400 m) offshore. Along other shores, the bottom may be hidden in as little as 100 feet (30 m) offshore.

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lake in California, United States of America
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