Mount Saint Helens is a volcano located in Skamania County, Washington in the Northwest region of the United States of America.
When Percy Jackson and Annabeth Chase investigated Mount Saint Helens for Hephaestus, they locate a group of Telekhines forging the blade of Kronos' scythe. Percy called upon his power and caused the mountain to erupt. This weakened the seal on Typhon's prison and lead to a reaction within the mountain that awakened him. It was reported that numerous illnesses and minor injuries were caused by the eruption. In addition, half a million people in the area were evacuated.
The mountain kept erupting and was soon obliterated, torn apart and completely destroyed when Typhon escaped from under the mountain.
- In real life, Mount Saint Helens was almost completely destroyed during an eruption in 1980.
- During the 1980 eruption, the mountain lost 1,300 feet off of its peak.
|Magical Locations:||Olympus | Camp Half-Blood | Camp Jupiter | Aeolia | C.C.'s Spa and Resort | Daedalus' Workshop | Lotus Hotel and Casino | Mount Othrys | Ogygia | Pan's Cave | Sea of Monsters | The Labyrinth | Tartarus|
|Cities, States, and Towns:||Alaska | Bar Harbor | Chicago | Detroit | Gila Claw | Jamestown | Long Island | Manhattan | New York City | Quebec | San Francisco | Vancouver | Westport|
|Other Locations:||Aunty Em's Gnome Emporium | Crusty's Water Bed Palace | Empire State Building | Gateway Arch | Grand Canyon | Greece | Hoover Dam | Junkyard of the Gods | Mount Saint Helens | Polyphemus' Island | ROFL | Rome | Triple G Ranch | Waterland | Mount Etna | Mount Diablo | Mount Tamalpais | Pikes Peak | Apennine Mountains|