hiking on the shoreline of hetch hetchy reservoir in yosemite national park, sierra nevada mountains, california; the reservoir is

adventure alpine america area bay beautiful california copy dam destination drinking edge exploration footpath francisco glacial hetch hetchy hiker hiking lake landscape leisure main man management mountain mountains national nature nevada one outdoor park path person recreation reservoir resource san scenery scenic shoreline sierra sources space sport states tourism touristic trail travel unidentified united usa vacation valley water yosemite