Lookout Summit—officially listed as "Lookout" in the Geographic Names Information System[3]—is the highest point in Benton County,[4] in the U.S. state of Washington.

The mountain is also the highest point in the Rattlesnake Hills,[5] with an elevation 98 ft (30 m) higher than the neighboring, more-well-known Rattlesnake Mountain—which is the second highest peak in the range (as well as the county).

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