Stealth And Detection In A Forest

In a sparse forest, the maximum distance at which a creature can succeed at a Perception check to detect the presence of others is 3d6×10 feet. In a medium forest, this distance is 2d8×10 feet, and in a dense forest it is 2d6×10 feet.

Because any square with undergrowth provides concealment, it’s usually easy for a creature to use the Stealth skill to hide. Logs and massive trees provide cover, which also makes hiding possible.

The background noise of a forest makes Perception checks that rely on sound more difficult, usually increasing the DC of the check at the GM’s discretion.