| Pinnacle Peak | |
| Elevation Ft: | 6562 |
| Prominence Ft: | 562 |
| Range: | Cascades, Tatoosh Range |
| Location: | Mount Rainier National Park, Washington, U.S. |
| Map: | USA Washington |
| Map Size: | 240 |
| Coordinates: | 46.7582°N -121.7326°W |
| Topo: | USGS Mount Rainier East |
| Easiest Route: | Scrambling south face |
Pinnacle Peak is a 6,562 ft (2,000 m) peak located in Mount Rainier National Park in Lewis County, Washington. It is the second highest peak in the Tatoosh Range.[1] There are two other Washington summits with the same name: Pinnacle Peak near Enumclaw, Washington, roughly 30miles to the northwest, and Pinnacle Peak in North Cascades State Park.
The trail to the saddle and summit has views of Rainier. Some scrambling and rock climbing is needed to attain the summit.[2] The Castle is situated to the east.
Pinnacle Peak is located in the marine west coast climate zone of western North America.[2] Most weather fronts originate in the Pacific Ocean, and travel northeast toward the Cascade Mountains. As fronts approach, they are forced upward by the peaks of the Cascade Range (orographic lift), causing them to drop their moisture in the form of rain or snowfall onto the Cascades. As a result, the west side of the Cascades experiences high precipitation, especially during the winter months in the form of snowfall.[2] During winter months, weather is usually cloudy, but, due to high pressure systems over the Pacific Ocean that intensify during summer months, there is often little or no cloud cover during the summer.[2] Because of maritime influence, snow tends to be wet and heavy.[2]