The Hainberg, and therefore the Bodensteiner Klippen, are a Natura2000 nature protection area, highest protection the EU can offer, so mind your step. Always check regulations, closures and zoning:
Due to a dispute with the owner, climbing is only allowed in the district of Goslar (southern area). Everything south of 'Strauchköpfe' is part of Goslar. Check the links above for more information.
For your own safety: On some cliffs someone sawed off the bolts. Check the conditions of the bolts before use.
Also, don't argue with local hunters, you might get shot.
do not use chalk²
no smoking, no wildfire
do not leave any waste
avoid the district of Wolfenbüttel⁴
¹Sandstone absorbs water and dissolves the clay inside the rock which holds the quartz together. Do not climb after rain, let the rock dry for at least 2 sunny sommer days, otherwise it will just break.
²Its hygroscopic property also makes the holds slick, since it will not wash out - it clogs the surface of the sandstone, the stone can no longer dry. AND we don't want to run foul with the owner and forester.
⁴See "Access issues" above.