| Lyon Peak | |
| Elevation Ft: | 8891 |
| Elevation Ref: | [1] |
| Prominence Ft: | 251 |
| Prominence Ref: | [2] |
| Isolation Mi: | 0.88 |
| Isolation Ref: | [3] |
| Parent Peak: | Needle Peak (8,971 ft) |
| Map: | California#USA |
| Map Size: | 250 |
| Label Position: | right |
| Location: | Granite Chief Wilderness |
| Country: | United States of America |
| State: | California |
| Region: | Placer |
| Region Type: | County |
| Range: | Sierra Nevada |
| Coordinates: | 39.2066°N -120.3154°W |
| Coordinates Ref: | [4] |
| Topo: | USGS Granite Chief |
Lyon Peak is an 8,891-foot-elevation (2,710 meter) mountain summit in Placer County, California, United States.
Lyon Peak is located in the Granite Chief Wilderness on land managed by Tahoe National Forest. It is situated two miles west of the crest of the Sierra Nevada mountain range, with precipitation runoff from the peak draining north into headwaters of North Fork American River, and south into headwaters of Middle Fork American River. Topographic relief is modest as the summit rises 2900abbr=offNaNabbr=off above the Middle Fork in 1.5 mile. Neighbors include Tinker Knob 3.1miles to the north-northeast, Granite Chief 1.6miles to the east-southeast, and line parent Needle Peak is 0.9miles east-southeast. The Palisades Tahoe ski area is four miles east of Lyon Peak. This landform's toponym has been officially adopted by the U.S. Board on Geographic Names,[4] and has appeared in publications since at least 1915.[5]
According to the Köppen climate classification system, Lyon Peak is located in an alpine climate zone.[6] Most weather fronts originate in the Pacific Ocean and travel east toward the Sierra Nevada mountains. As fronts approach, they are forced upward by the peaks (orographic lift), causing them to drop their moisture in the form of rain or snowfall onto the range.