Jack Mountain

It towers dramatically over the south end of Ross Lake, rising 7,450 ft (2,270 m) above the lakeshore in only 3 horizontal miles (4.8 km).All are long routes with a great deal of vertical gain,[4] meaning most parties take three to four days to climb the mountain.The lower flanks of the mountain on the Ross lake side are composed of many different rock types including Orthogneiss, Ultramafic rock, low grade Phyllite, Tonalite, Continental glacier drift, Diorite, and Schist.Jack Mountain was created when the Hozameen Range was thrusted over the younger Harts Pass formation to the east.The lower flanks of the mountain to the west were created by the Ruby Creek Heterogeneous plutonic belt.
West aspect, from Diablo Lake Vista Point
Elevation NAVD 88ProminenceCoordinatesWhatcom CountyWashington, U.S.Parent rangeNorth CascadesFirst ascentEasiest routeexposureclass 4WashingtonRoss LakeNohokomeen GlaciercirqueMetavolcanic rockMetasedimentary rockHozameen RangeGreenstoneJurassicPermianCretaceous periodOrthogneissUltramafic rockPhylliteTonaliteDioriteSchistthrust faultRoss Lake FaultFred BeckeyNational Geodetic SurveyNational Oceanic and Atmospheric AdministrationUnited States Department of CommerceGeographic Names Information SystemUnited States Geological SurveyUnited States Department of the InteriorThe 25 highest major summits of WashingtonMount RainierMount AdamsMount BakerGlacier PeakBonanza PeakMount StuartMount FernowGoode MountainMount ShuksanBuckner MountainMount SpickardBlack PeakMount RedoubtNorth Gardner MountainDome PeakSilver Star MountainEldorado PeakDragontail PeakOval PeakMount LagoRemmel MountainMount Saint HelensCastle PeakTiffany Mountain