Waldo Lake is a natural alpine lake in the Cascade Mountains of the U.S. state of Oregon. It is the second largest natural non-alkali lake in Oregon with just under of water surface and a maximum depth of . The lake is named after Oregon politician, judge, and conservationist John B. Waldo. Location The lake is located in Lane County at an elevation of above sea level. Access is via Forest Service Road 5897 from Oregon Route 58 approximately east of Oakridge. The forest road travels to the lake. History The area was first inhabited by Native Americans, and the lake was later discovered by Molalla Indian Charlie Tufti. According to pioneer resident Frank S. Warner it was then named Pengra Lake after Byron J. Pengra, a pioneer railroad champion. Later the lake was named in honor of Judge John B. Waldo from the Oregon Supreme Court who helped push for preservation in the Cascades which began with the Cascade Forest Reserve established by President Cleveland in 1893. Waldo was the son of Daniel Waldo for whom the Waldo Hills are named. The area was also used by sheep farmers for grazing prior to the establishment of recreation facilities by the Civilian Conservation Corps during the Great Depression in 1939. Later facilities were built by the Forest Service in 1971. In 1979 the lake received around 10,000 visitor days per year, and by 1989 that number increased to 32,000 per year. Between those years, in 1984, to the north, west, and south were designated as the Waldo Lake Wilderness by the federal government. In 1996, a forest fire, the Charlton fire, swept by the lake and forced the evacuation of several campgrounds while burning much of the north side of the lake's surrounding forest. Reservoir plans Starting in 1905, plans were begun to use the lake as a reservoir for irrigation in the Willamette Valley. To this end, the Waldo Lake Irrigation and Power Company was created in 1908 by several people including F.H. Ray. In 1909 a permit was issued by the Forest Service to build a tunnel from the lake to a nearby creek. Construction of the tunnel began that year and finished in 1914 under the direction of engineer Simon Klovdahl. The tunnel was able to lower the lake level by . However, the company was never able to prosper and the head gates on the southwest