Howling Rock is the name of the mountain where wolves of the Eastern and Western packs meet to socialize, dance, and howl at the moon. These events being called Moonlight Howls.
A rule regarding Howling Rock is that Alphas and Omegas are not allowed to howl with each other.
It appears that this location is not in the sequels.
- The first movie in this location, the last frame being the moon.