The mountains were originally called "Sun-a-do" by the Duwamish Indians, while the first European to see them, the Spanish navigator Juan Perez, named Mount Olympus "Santa Rosalia", in 1774. But the English captain John Meares, seeing them in 1788, thought them beautiful enough for the gods to dwell there, and named the highest point "Mount Olympus" after the mountain in Greece. Various names for the mountains were used based on the name Mount Olympus, including the Olympic Range, the Olympian Mountains, and the Olympus Range. Alternate proposals never caught on, and in 1864 the Seattle Weekly Gazette persuaded the government to make the present-day name official, although other names continued to be used. The rock that is in then mountains are Sandstone, Shale, & Basalt.
The Olympic Mountains of Washington state were actually “pasted to” the North American continent as a result of an ancient ocean floor smashing into the continental landmass starting about 35 million years ago. Because of the movement of the tectonic plates in this region, the top of the seafloor folded from the pressures, creating what was the beginnings of the Olympic Mountains; the lower layer of the seafloor dove beneath the Olympic area, creating enough heat to form the volcanoes of the Cascade Range. These mountains are not as high as other peaks in the Rockies the highest, Mt. Olympus, is just under 8,000 feet (2,440 meters)—but they are still large enough to reveal their torturous, twisted past. The peak of the mountain is Mt.Olympic. The elevation is 7,962 ft.