Mount Jupiter is a 5,711-foot (1,741-meter) mountain summit in the Olympic Mountains and is located in Jefferson County of Washington state. It is situated in The Brothers Wilderness on land managed by Olympic National Forest. Mount Jupiter is easy to identify from Seattle, since it appears as the prominent peak between The Brothers and Mount Constance. Precipitation runoff from the north side of the mountain drains into the Dosewallips River, whereas the south side drains into the Duckabush River. Topographic relief is significant as the summit rises 5,100 feet (1,554 meters) above the Duckabush Valley in 1.5 miles (2.4 km). The Jupiter name was applied by the Seattle Press Expedition in an effort to link the peak with the Greco-Roman mythological names associated with Mount Olympus. Jupiter was a Roman god on Olympus. The mountain's toponym has been officially adopted by the United States Board on Geographic Names.
Best months
Hiking score 0–100 · 10-yr climate averages
Rows beneath each bar: mean temperature, monthly precipitation. Highest-scoring month in red.
