Lost Forest/Dunes/Fossil Acec

Near Christmas Valley, Oregon

Lost Forest/Dunes/Fossil Acec does not offer reservations through Recreation.gov. Please take a look at the area details below for more information about visiting this location. Enjoy your visit!


The Christmas Valley Sand Dunes Area of Critical Environmental Concern (ACEC) in south-central Oregon is the largest inland shifting sand dune system in the Pacific Northwest . It is a popular destination for off-highway vehicle enthusiasts with nearly 8,900 acres of the Sand Dunes site open to vehicle use. Nearby, the Lost Forest Research Natural Area is an unusual stand of ancient ponderosa pine forest, the remnant of a forest that existed in a cooler and wetter age. Another facet of the ACEC is Fossil Lake, the site of paleontological work for more than 100 years and where hundreds of species of reptiles, birds, fish, and mammals have been identified.

Know Before You Go:

Point of Interest:

Fossils found at nearby Fossil Lake range in age from about 10,000 years to as much as 400,000 years. Access to this special area is limited to walk-in traffic only.