• Speleothems in Miller's Chapel.

    Oregon Caves

    National Monument Oregon

There are park alerts in effect.
hide Alerts »
  • Cave Creek Campground Closed

    Cave Creek campground located at Mile Marker 16 is currently closed due to hazard trees.

Natural Features & Ecosystems

At Oregon Caves National Monument, we observe unique ecosystems above ground in an old-growth forest and below ground in a cave system. These ecosystems blur in what is known as "twilight zones" of caves--the region of the cave where there is an opening to the forest, where light can penetrate the room. We find photosynthetic plants such as mosses in this area. Furthermore, some animals who inhabit cave environment depend on the forest outside for food. As a result, animals such as bats and wood rats are often found inside twilight zones. There exists a deep connection between a forest and a cave as both environments are linked through biology, chemistry, and hydrology.

Did You Know?

Forest Service guide. Photo taken around 1915

Oregon Caves was managed by the Forest Service from 1909 to 1934 then it was transferred to management by the National Park Service.