Lost Forest/Dunes/Fossil ACEC

About Lost Forest/Dunes/Fossil ACEC

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 GoOff-Highway Vehicles (OHVs) are allowed only on designated routes or areas. Oregon ATV permits required.Camping is allowed in designated sites only. Sites are primitive with no facilities, water, or restrooms provided.Firewood collecting or cutting is PROHIBITED.The Fossil Lake Area is CLOSED to OHVs.Collecting fossils by the public is STRICTLY PROHIBITED throughout the Fossil Lake Area.The nearest services are located in Christmas Valley, Oregon, approximately 16 miles southwest.Point of InterestFossils 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.

How to Get There

From Christmas Valley, Oregon, travel east on County Road 5-14 for 8 miles. Turn left (north) on County Road 5-14D and travel another 8 miles. Turn right (east) at the “T” and travel 3 miles on County Road 5-14E to the entrance of the Sand Dunes. Another 4 miles on Bureau of Land Management Road 6155 will bring you to the Lost Forest.

Plan Your Visit to Lost Forest/Dunes/Fossil ACEC

Heading to Lost Forest/Dunes/Fossil ACEC? A few things to know before you go:

• Reservations: popular sites fill up fast — check Recreation.gov 6 months in advance
• Fees: day-use and camping fees vary; check current rates on the official park page
• Trash & pack-out: follow Leave No Trace principles
• Wildlife: store food in bear boxes where provided; never feed wildlife
• Weather: the 5-day forecast above is updated every 6 hours; verify just before you go

References & Official Resources

• Official Recreation.gov page
• Park map (PDF)
• View on OpenStreetMap
• Driving directions (Google Maps)