Lyons Peak

{{Short description|Mountain in San Diego County, California, United States}}

{{Use mdy dates|date=January 2025}}

{{Infobox mountain

| name = Lyons Peak

| photo = Lyons Peak.jpg

| photo_caption = Lyons peak from the east

| elevation_ft = 3741

| elevation_ref = {{cite ngs |pid=DC2039 |name=Lyons peak |access-date=2021-09-17}}

| prominence = {{convert|1360|ft|0}}

| prominence_ref = {{cite peakbagger |pid=21331 |name=Lyons Peak, California |access-date=2021-09-17}}

| isolation_mi = 3.69

| isolation_ref =

| location = San Diego County, California, U.S.

| range =

| etymology =

| coordinates = {{coord|32.701759792|N|116.764053200|W|type:mountain_region:US-CA_scale:100000|format=dms|display=inline,title}}

| coordinates_ref =

| topo = USGS Dulzura

}}

Lyons Peak is a prominent mountain in San Diego County, California. The top of the mountain is enclosed in an almost rectangular patch of Cleveland National Forest. An old fire lookout tower is located at the peak.{{cite web |url=https://www.ffla-sandiego.org/fire-lookout/southern-california-towers/lyons-peak/ |title=Lyons Peak |publisher=San Diego - Riverside Chapter of the Forest Fire Lookout Association |access-date=2021-09-17}}

Lyons Peak is located on restricted land and trespassing is prohibited. The peak's toponym honors Nathaniel Lyon (1818–1861).Colonel Hans Christian Adamson (2016), Rebellion In Missouri 1861: Nathaniel Lyon And His Army Of The West, Golden Springs Publishing, (Originally published: 1961), {{ISBN|9781786256423}} As an army captain, he passed by the peak in 1851 while scouting a new route east to the desert.Priscilla Lister (2016), Take a Hike: San Diego County, Archway Publishing, {{ISBN|9781480825406}}