Cache saturation refers to the proximity of different caches to each other.
Geocaching.com Cache Saturation Guidelines
The cache saturation guidelines at Geocaching.com are intended to limit the number of caches hidden in a particular area, and to encourage cache owners to seek out new places to hide caches, rather than hiding more caches near existing caches.
According to these cache saturation guidelines, any container or other physical stage of a cache should be no closer than 0.1 mile (528 feet, 161 metres) to the containers and physical stages of any other caches.
These guidelines apply to any physical object placed by a geocache owner. Naturally these guidelines apply to caches and other containers, but they also apply to anything else placed by a geocache owner, including tags with coordinates and other objects with information on them. Those hiding caches should note that these guidelines also apply to physical stages that may not be visible to them, including:
- hidden stages of multi-caches
- final locations of mystery/puzzle caches
- Premium Member Only caches
- unpublished caches which are in line for review ahead of theirs
These guidelines do not apply to event caches, EarthCaches, grandfathered virtual caches, or grandfathered webcam caches. Also, these guidelines do not apply to the bogus coordinates of mystery/puzzle caches, or to non-physical stages like reference points, trailhead coordinates, parking coordinates, or "question to answer" waypoints (that is, existing objects like signs or plaques where seekers can find information).
Also, these guidelines apply only to the physical stages of other caches. There is no restriction on the distance between multiple stages of a single cache.