Rattlesnake Mountain (Benton County, Washington)

Rattlesnake Mountain
The view of Rattlesnake Mountain from the Horn Rapids Golf Course in Richland.
Highest point
Elevation3,531 ft (1,076 m)
Prominence840 ft (260 m)
Parent peakLookout Summit
Isolation1.55 mi (2.49 km)
ListingBenton County highest peaks 2nd
Coordinates46°24′56″N 119°37′49″W / 46.41556°N 119.63028°W / 46.41556; -119.63028
Geography
Rattlesnake Mountain
Parent rangeRattlesnake Hills
Topo maps
  • USGS Iowa Flats
  • USGS Snively Basin

Rattlesnake Mountain (Native American name Lalíik meaning "land above the water") is a 3,531 ft (1,060 m) windswept treeless ridge overlooking the Hanford nuclear site. Parts of the western slope are privately owned ranchland, while the eastern slope is under the federal protection of the Arid Lands Ecology Reserve, a unit of the Hanford Reach National Monument, managed by the United States Fish and Wildlife Service. The mountain is the second highest point in Benton County, with its neighbor Lookout Summit surpassing it by only 98 ft (30 m).

Rattlesnake Mountain is notable for its high wind speeds, with the highest recorded being around 150 mph (241 kilometers per hour).