Half-Blood Hill

Half-Blood Hill is one of the hills surounding the valley where Camp Half-Blood is located. It is well known for being the place where Thalia gave her life to save her friends and where her pine tree is (in fact, it was named "Half-Blood Hill because Thalia gave her life there). After several automatons, including the bronze dragon, Thalia's Tree successfully guarded the hill and kept monsters out. The Golden Fleece now protects the hill, since the tree no longer uses Thalia's spirit. Peleus the dragon guards the Golden Fleece. Mortals and monsters cannot go past the hill's magic borders, unless one of the campers, Chiron or Mr. D allow them in, an example being in The Sea of Monsters when Annabeth let Tyson (a cyclops) in. In The Lightning Thief, Percy killed the Minotaur on Half-Blood Hill. To mortals, Half-Blood Hill is a strawberry farm.

Camp Half-Blood
Half-Blood Hill is the entrance to Camp Half-Blood which is located in Long Island, New York City at Farm Road, Montauk, New York 3.141.

The Lightning Thief
Half-Blood Hill appears in The Lightning Thief two times. One is when Percy is fighting the Minotaur at the entrance to Camp Half-Blood after the Minotaur had stolen his mom, Sally Jackson. Also, Percy killed the Minotaur with the bullman's broken horn. The second time that it appears is when Percy is beginning his first quest - to recover Zeus's stolen master bolt - with Annabeth Chase and Grover Underwood, a satyr and Percy and Annabeth's best friend and protector.

Film Adaptation
Half-Blood Hill is shown in the film at nightfall after Percy, Grover, and Sally Jackson, Percy's mortal mom, arrive by running from Percy's first step dad's car (Gabe Ugliano's damaged Camaro '87) which﻿ was destroyed by the Minotaur. It has a sign over the entrance proclaiming Camp Half-Blood which is lit up at night by automatic flames.

The Sea of Monsters
Half-Blood Hill is shown at daylight when it is attacked by three celestial bronze Colchis Bulls, automatons made by Hephaestus, while the magical border that it holds is breaking down (it was later discovered by Percy that Luke had fed snake poison to Thalia's Tree). Percy tries to help Clarisse La Rue, a demigod daughter of Ares, fight the bulls but he gets a little bit injured, forcing Annabeth to allow his cyclops half-brother and son of Poseidon, Tyson, to go into camp and help fight the Colchis Bulls effectively.

The Last Olympian
Half-Blood Hill makes three appearances in The Last Olympian. The first was when Annabeth and the other camp members except Ares cabin (until later on to help fight the drakon) left Camp Half-Blood in three Delphi Strawberry Co. (Camp Half-Blood's name to mortals) vans to meet Percy at the front steps of the Empire State Building.

The second appearance is when Percy is shown a vision of the past where Hermes and Luke's mortal mom, May Castellan are at the steps on the porch of the Big House at Camp Half-Blood talking to Chiron about whether Luke's mom should be holding the Oracle's body or not. Hermes tried to talk her out of it, but his objections made no effect on her decision. Reluctantly, Hermes agrees to her idea and allows her to go into the Big House Attic where the Oracle of Delphi's mummied body is located in.

Hermes and Chiron thinks all is fine while they are waiting on the porch of the Big House patiently until they hear a scream and light flashing through the Big House Attic's windows. Later, Hermes realizes that he was correct before because he realized that the Oracle was under a curse (or possibly) set by Hades on a grudge against his brother Zeus for killing Maria di Angelo.

The third appearance happens when Percy is told by another cabin member that his pegasi, Blackjack, was used (by force) by a mortal girl, Rachel Elizabeth Dare, as transport to Camp Half-Blood on a hurried mission (to be the new carrier for the Oracle of Delphi after Hades's curse over the oracle was raised) after the Battle of Manhattan.

Percy, Annabeth, Grover, and all of the other campers hurry back to Camp Half-Blood by the camp's three vans after Percy was told about Blackjack being used as "hurried transport." Once there, Percy hurries to the porch of the Big House and meets Blackjack outside. Blackjack tells him that he couldn't stop Rachel for she insisted to take him without telling Percy at all which Percy says that it really doesn't matter to him.

The Lost Hero
Half-Blood Hill is only seen once when Jason Grace goes on a quest to save Hera, the goddess of marriage, Queen of heaven, and sister-wife of Zeus, from Porphyrion the leader of the Giants with Piper McLean, daughter of Aphrodite and Leo Valdez, son of Hephaestus.