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Mount Diablo is a mountain in Contra Costa County in the San Francisco Bay Area (3,849 feet).

The Heroes of Olympus[]

The Lost Hero[]

Enceladus GN

Enceladus

Mount Diablo is where the goddess Athena trapped Enceladus a millennia ago after the first Gigantomachy. Gaea freed him and Enceladus now uses the mountain to imprison his enemies like Tristan McLean. After being told the location by Aeolus, Jason Grace, Piper McLean, Leo Valdez, and Coach Hedge went to Mount Diablo to free Piper's dad. While the were climbing up the mountain, Gaea attempted to stop them by making the path like quicksand. Once, they reached the top, the Gigas sent Earthborn to attack them, they were defeated by Leo and Piper. Jason killed Enceladus with the help of his father Zeus and re-trapped him in the mountain.

The Trials of Apollo[]

The Dark Prophecy[]

After Meg McCaffrey is placed on the Throne of Memory, she recites a prophecy of the Oracle of Trophonius. The second line is Ere new moon rises o'er the Devil's Mount, which makes Leo believe it refers to Mount Diablo.

Trivia[]

  • The Native Americans of the area, Chumash, lost a battle against the Spaniards there earning the mountain its name, the Devil Mountain (in Spanish). It is considered a cursed yet holy place for them.
Locations (CHB)
Magical Locations: Aeolia | Athena Parthenos Shrine | Antaeus' Arena | Camp Fish-Blood | Camp Half-Blood | Camp Jupiter | Cave of Trophonius | C.C.'s Spa and Resort | Daedalus' Workshop | Labyrinth | Lotus Hotel and Casino | Mount Othrys | Ogygia | Olympus | Pan's Cave | Tarquin's Tomb | Sea of Monsters | Tartarus | Underworld | Waystation | Zeus' Palace
Cities and Towns: Atlanta | Athens | Anchorage | Bar Harbor | Berkeley | Bologna | Buford | Charleston | Chesapeake Beach | Chicago | Cloudcroft | Colorado Springs | Denver | Detroit | Évora | Gila Claw | Houston | Indianapolis | Jamestown | Keeseville | Los Angeles | Las Vegas | Leeds Point | Malibu | Miami | Montauk | Nashville | New Orleans | Newark | New York City | Oakland | Omaha | Palm Springs | Paris | Pasadena | Philadelphia | Quebec City | Richmond | Rome | San Francisco | San Juan | Santa Barbara | Santa Monica | Seward | Sparta | Split | Seattle | St. Augustine | St. Louis | Tahlequah | Vancouver | Venice | Virginia Beach | Washington, D.C. | Westport | Yonkers
Administrative Divisions: Alaska | Alentejo | Arizona | British Columbia | California | Colorado | Connecticut | Dalmatia | Florida | Georgia | Illinois | Indiana | Kansas | Louisiana | Maine | Maryland | Michigan | Missouri | Nebraska | Nevada | New Jersey | New Mexico | New York | Ohio | Oklahoma | Oregon | Pennsylvania | Puerto Rico | Quebec | South Carolina | Tennessee | Texas | United States Virgin Islands | Utah | Virginia | Washington
Countries: Canada | Croatia | France | Greece | Italy | Portugal | United States of America
Continents: Africa | Europe | North America
Other Locations: Atlantic Ocean | Alternative High School | Apennine Mountains | Aunty Em's Gnome Emporium | Brooklyn | Caldecott Tunnel | Calvert Peninsula | Caribbean Sea | Carlsbad Caverns | Central Park | Charleston Harbor | Crusty's Water Bed Palace | Empire State Building | Gateway Arch | Grand Canyon | Hell's Kitchen | Hephaistos Building Supplies | Hoover Dam | Jackson Apartment | Jackson-Blofis Apartment | Junkyard of the Gods | Long Island | Mediterranean Sea | Mississippi River | Mount Diablo | Mount Etna | Mount Saint Helens | Mount Tamalpais | Mount Vesuvius | Nero's Tower | Oakland Airport | Panama Canal | Pacific Ocean | Pikes Peak | Plaza Hotel | Polyphemus' Island | Poseidon's Summer Villa | Queens | Rocky Mountains | Rainbow Organic Foods & Lifestyles | Roman Empire | San Francisco Bay | St. Thomas | Triple G Ranch | United Nations Headquarters | Waterland | Yancy Academy
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