Monitor Pass (el. 8,314 ft / 2,534 m) is a high

mountain pass A mountain pass is a navigable route through a mountain range or over a ridge. Since many of the world's mountain ranges have presented formidable barriers to travel, passes have played a key role in trade, war, and both Human migration, human a ...

California California is a U.S. state, state in the Western United States, located along the West Coast of the United States, Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the List of states and territori ...

in the

Sierra Nevada The Sierra Nevada () is a mountain range in the Western United States, between the Central Valley of California and the Great Basin. The vast majority of the range lies in the state of California, although the Carson Range spur lies primarily ...

southeast of

Lake Tahoe Lake Tahoe (; was, Dáʔaw, meaning "the lake") is a Fresh water, freshwater lake in the Sierra Nevada (U.S.), Sierra Nevada of the United States. Lying at , it straddles the state line between California and Nevada, west of Carson City, Nevad ...

. It is traversed by State Route 89 near that highway's southern terminus at

U.S. Route 395 U.S. Route 395 (US 395) is a U.S. Route in the western United States. The southern terminus of the route is in the Mojave Desert at Interstate 15 near Hesperia. The northern terminus is at the Canada–US border near Laurier, where the road be ...

near the community of Topaz. While this section of Route 89 serves to connect the basins of the

West Walker River The West Walker River is a tributary of the Walker River, approximately long,U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map accessed March 17, 2011 in eastern California and western Nevada in t ...

and

Carson River The Carson River is a northwestern List of Nevada rivers, Nevada river that empties into the Carson Sink, an endorheic basin. The main stem of the river is long although the addition of the East Fork makes the total length , traversing five co ...

, Monitor Pass itself lies on a side ridge between tributaries of the East Fork Carson River. Crossing the pass allows for a more direct route between U.S. 395 and

Markleeville, California Markleeville (formerly, Markleville) is a census-designated place (CDP) and the county seat of Alpine County, California, United States. The population was 210 at the 2010 census, up from 197 at the 2000 census. History Jacob J. Marklee founded ...

, at the expense of some additional elevation. Monitor Pass is part of the route taken by

Jedediah Smith Jedediah Strong Smith (January 6, 1799 – May 27, 1831) was an American clerk, transcontinental pioneer, frontiersman, hunter, trapper, author, cartographer, mountain man and explorer of the Rocky Mountains, the Western United States, and ...

in late spring of 1827 when leaving California at the end of his first exploratory journey, the first crossing ever of the Sierra Nevada by a non-native. Smith first came down from

Ebbetts Pass Ebbetts Pass (el. ), named after John Ebbetts, is a high mountain pass through the Sierra Nevada range in Alpine County, California. Ebbetts is the eastern of two passes in the area traversed by State Route 4. The western pass is the Pacific Grad ...

, then continued from Monitor Pass past

Topaz Lake Topaz Lake is a reservoir located on the California-Nevada border, about south of Reno. The census-designated place of Topaz Lake, Nevada, is located along its northwest shore. The modern reservoir was formed by diverting waters from the West ...

into Nevada. The highway through the pass was completed in the early 1950s, making it one of the most recent Sierra Nevada passes to be opened by a paved road. The highway project was promoted by Robert M. Jackson of Markleeville, who worked for the Alpine County Public Works Department for more than 30 years. State Route 89 over Monitor Pass is subject to winter closure due to snow accumulation. Dates of closure vary depending on the weather, but Monitor Pass is generally closed to vehicular traffic between late November and early April.

References

External links

Video of road traversal of Monitor Pass
Landforms of Alpine County, California Mountain passes of the Sierra Nevada (United States) {{AlpineCountyCA-geo-stub