Sentinel Peak is a 9,634-foot-elevation summit in Inyo County, California, United States. It is located near Panamint City, California. Sentinel Peak is the sixth-highest mountain of the Panamint Range, and it is set within Death Valley National Park and the Mojave Desert. Precipitation runoff from this mountain's east slope drains to Death Valley via Johnson C…Sentinel Peak is a 9,634-foot-elevation summit in Inyo County, California, United States. It is located near Panamint City, California. Sentinel Peak is the sixth-highest mountain of the Panamint Range, and it is set within Death Valley National Park and the Mojave Desert. Precipitation runoff from this mountain's east slope drains to Death Valley via Johnson Canyon, whereas the west slope drains to Panamint Valley via Happy and Surprise canyons.