Caves Highway (Hwy 46) leading to the monument will be repaved by the Oregon Department of Transportation beginning Monday June 10, 2013 until Thursday June 13, 2013. Please allow extra time for your travel and drive with caution.
The Monument Showcases Diversity and Species at their Range Limits
The Siskiyou/Klamath bioregion has perhaps the most relict animals (amphizoid beetles, Calymmaria spiders, and grylloblattids) to name a few.
These creatures may have survived the lateral blast and tidal wave of the dinosaur-killing asteroid by being beneath and behind one of the few mountains then in North America, the Klamath-Siskiyou-Belts. More likely, this range, as persistent and therefore as biodiverse as the Appalachians, kept increasing diversity due to mountain moderation of most disturbances. It also provided among the first temperate climates, and many varied and isolated habitats to evolve in, migrate to, and escape extinction during climate change.
Did You Know?
The mountains surrounding Oregon Caves are composed of ocean crust including rocks uplifted directly from the mantle. These mantle rocks make up one of the largest serpentine rock outcrops in the nation.