"You can't Apparate inside the Hogwarts grounds, how often do I have to tell you?"
-- Hermione Granger
Hogwarts castle is located atop a cliff overlooking a lake. The lake is to the south of the castle (PA6) and the front doors face generally to the west (PA21). There is a small underground inlet, it’s entrance covered with hanging ivy, that leads to a stony beach below the castle at the base of the cliff. From here, a path leads up to the front door of the castle. A road runs around the lake, past the village of Hogsmeade, to the south of the lake where the railway station is located. The grounds are quite extensive, taking in a large forest and enough open space that folks in the castle never notice the fiery breath and roaring of group of four angry dragons kept in a paddock near the forest for the Triwizard Tournament. A wall or fence encloses the entire area. The main entrance gate is flanked by pillars on which stand statues of winged boars.
The Quidditch Pitch is to the west of the castle and the Forbidden Forest is to the east. Hagrid’s hut is an the edge of the forest (PS8). The pumpkin patch and vegetable patch are behind it (CS7, PA16, PA21). There is a wide flat lawn opposite the castle from the forest and Hagrid’s hut where the first-years took their first flying lesson. Sloping lawns lead down toward the forest and border the lake. Near the lake the white tomb of Albus Dumbledore.
The entire grounds as well as the castle are protected by magic spells. Hogwarts is hidden from Muggle eyes. The castle is bewitched so that if a Muggle looks at it, all they see is a moldering old ruin with a sign over the entrance saying DANGER, DO NOT ENTER, UNSAFE.