Ruby Mountain (Washington)

Ruby Mountain
Ruby Mountain, east aspect
Highest point
Elevation7,412 ft (2,259 m) NAVD 88
Prominence3,888 ft (1,185 m)
Parent peakRed Mountain (7,658 ft)
Isolation4.24 mi (6.82 km)
Coordinates48°41′40″N 121°02′34″W / 48.694438°N 121.042906°W / 48.694438; -121.042906
Geography
Ruby Mountain
Location in Washington
Interactive map of Ruby Mountain
CountryUnited States
StateWashington
CountyWhatcom
Parent rangeNorth Cascades
Topo mapUSGS Ross Dam
Geology
Rock ageEocene to Late Cretaceous
Rock typeSchist
Climbing
First ascent1916 Tommy Thompson
Easiest routeScrambling

Ruby Mountain is a prominent 7,412-foot (2,259-metre) mountain summit located in the North Cascades Range of Washington state. It is situated in Ross Lake National Recreation Area which is part of the North Cascades National Park Complex. The Diablo Lake Overlook along the North Cascades Highway is at the foot of the mountain. The nearest higher peak is Colonial Peak, 4.2 miles (6.8 km) to the southwest. Precipitation runoff on the east side of the mountain drains to Ross Lake via Ruby Creek, whereas the west side of the mountain drains to Diablo Lake via Thunder Creek. Topographic relief is significant as the summit rises 6,200 feet (1,900 meters) above Diablo Lake in approximately two miles.