The Hildesheim Forest is located in the Innerste Uplands, part of the Lower Saxon Hills, between the valleys of the Leine to the west, the Innerste to the north and the Lamme to the east. These densely forested hills, which are bordered to the east by the Sauberge and lie a few kilometres west-southwest of the Vorholz, fill an area south of Hildesheim, northwest of Bad Salzdetfurth, north of Sibbesse and southeast of Nordstemmen.
The Hildesheim Forest,which attain a height of Griesberg, are crossed by numerous waterways, hiking trails and forest tracks, but only by one state road, the L 485, which links Hildesheim via Diekholzen to Sibbesse. In its northwestern part is the Beusterburg, whose circular ramparts are suggestive of a New Stone Age settlement. In the vicinity of the village of Betheln there is a Bronze Age burial site (Hügelgräberfeld). Further away from the village there is also a number of brine springs. At the northern end of the Hildesheim Forest is the Heyersum Saltworks (Saline Heyersum). In addition there is a transmission tower on the Griesberg and several observation towers.in the
A section of the Hanover–Würzburg high-speed railway runs through the Hildesheim Forest through three tunnels (see the section on ‘hills’), over bridges and on stretches of open line.
These are some of the streams that rise in the Hildesheim Forest:
- Despe (eastern tributary of the Leine)
- Gehlenbach (western tributary of the Lamme)
- Kalte Beuster (right and southeastern source stream of the Beuster)
- Klusbach (western tributary of the Lamme)
- Warme Beuster (left and northwestern source stream of the Beuster)
The following waterways flow past the Hildesheim Forest:
- Alme (tributary of the Riehe)
- Innerste (tributary of the Leine)
- Lamme (tributary of the Innerste)
- Leine (tributary of the Aller)
- Riehe (tributary of the Lamme)
- Trillkebach (tributary of the Innerste)