A signal mountain or signal peak is a mountain suited to sending and receiving visual signals, either from its topographic prominence and isolation or from being located where signal communications are most needed. For example, Tennessee's Signal Mountain was used by Native Americans to send fire and smoke signals across the Tennessee Valley. It was also used by the Union Army as a visual communications station during the American Civil War. Mount Lassic in California has low prominence but is also known as Signal Peak due to the heliograph station that was located on this peak around 1900. And the highest peak in the Pine Valley Range, Utah's Signal Peak, is "supposedly named because of its use in World War II when beacons were placed on the mountain to guide airplanes at night."[1]
| width=20% | Peak | Photo | Nation | County, Province/State | Coordinates | Elevation | Prominence | width=25% | Notes |
|---|---|---|---|---|---|---|---|---|---|
| Canada | Alberta | 52.8594°N -117.967°W | |||||||
| Mexico | Baja California | 32.4742°N -116.8969°W | The mountain, in northern Baja California, dominates over California's Imperial Valley area, including over the town of Mount Signal, California, which is named for it. | ||||||
| United States | Shelby County, Alabama | 33.3969°N -86.5808°W | |||||||
| United States | Valdez-Cordova Census Area, Alaska | 60.2844°N -146.6381°W | |||||||
| United States | Maricopa County, Arizona | 33.2078°N -112.9544°W | |||||||
| United States | Pinal County, Arizona | 33.3444°N -110.9992°W | |||||||
| United States | Humboldt County, California | 40.3339°N -123.5544°W | Also known as Mount Lassic, in the Coast Range. Its "Signal Peak" name derives from the heliograph station that was located on this peak around 1900. | ||||||
| United States | Orange County, California | 33.6061°N -117.8119°W | A major two-way radio site for Orange County, and a visual reporting checkpoint for aircraft inbound to land at John Wayne Airport. | ||||||
| United States | Tahoe National Forest, California | 39.3392°N -120.5356°W | |||||||
| United States | Cobb County, Georgia (U.S. state) | 33.8686°N -84.4667°W | A low mountain from whose top the church spires of Atlanta could be seen during the American Civil War | ||||||
| United States | Coos County, New Hampshire | 44.7614°N -71.2275°W | |||||||
| United States | Grafton County, New Hampshire | 44.2881°N -71.9756°W | |||||||
| United States | Hamilton County, Tennessee | 35.1214°N -85.375°W | |||||||
| United States | Scott County, Tennessee | 36.2833°N -84.4678°W | |||||||
| United States | Culberson County, Texas | 31.8915°N -104.8607°W | Also known as Signal Peak, the highest natural point in the state of Texas | ||||||
| United States | Howard County, Texas | 32.2014°N -101.3125°W | |||||||
| United States | Washington County, Utah | 37.3197°N -113.4917°W | Highest peak in Pine Valley Mountains | ||||||
| United States | Caledonia County, Vermont | 44.2056°N -72.3247°W |
| ||||||
| United States | Fauquier County, Virginia | 38.8814°N -77.7031°W | |||||||
| United States | Teton County, Wyoming | 43.8489°N -110.5672°W | An isolated volcanic summit with sweeping views of the geologically distinct Teton Range. | ||||||
| Signal Hill | United States | Williamson County, Texas | |||||||
| Signal Hill[2] | United States | Hays County, Texas | |||||||