State Route 89

California State Route 89

California 89 is a major north-south route serving the northern Sierra Nevada mountain communities. Starting near Topaz Lake near the California-Nevada state line at U.S. 395, California 89 initially parallels the state line to the west before passing over Monitor Pass (el. 8,314 feet) en route to Markleeville, the Alpine County seat. Merging briefly with California 88 near Woodfords and with U.S. 50 near South Lake Tahoe, California 89 becomes a portion of the Lake Tahoe ring road, closely following the west shore of the lake between South Lake Tahoe and Tahoe City. California 89 then splits away from the lake to meet Interstate 80 in Truckee, which is occasionally cited as one of the coldest spots in the nation in the daily weather report. North of Truckee, California 89 passes through the Tahoe and Plumas National Forests, passing through the Plumas County seat of Quincy before entering Lassen National Volcanic Park. The route does not pass through any major towns or cities until it reaches Mount Shasta. The junction with Interstate 5 at Mount Shasta marks the northern terminus of California 89.

California State Route 89 Guides

According to the U.S. Geological Survey, Lake Tahoe has a water clarity of about 70 feet, which is less clarity than measured in the 1960s (when it was approximately 100 feet). The lake sits at an average surface elevation of 6,225 feet and has an average water temperature between 65-70 degrees in the late summer. Covering an area of 191 square miles, the lake has been measured at approximately 1,637 feet deep at its deepest point. This lowest point is located in the northern third of the lake toward the middle (almost due east of Tahoe City; the Benchmark Atlas of California clearly shows the approximate location of the deepest point in the lake). The lowest point of the lake is lower than the nearby Carson Valley in Nevada.

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Page Updated Thursday October 08, 2009.