Big Obsidian Flow Trailhead and Interpretive Site

Area Status: Closed

At a mere 1300 years old, the Big Obsidian Flow is the youngest lava flow in Oregon. A one-mile interpretive trail climbs up and onto this impressive lava flow of obsidian (black glass) and pumice, which is located within the Newberry National Volcanic Monument. The Newberry Crater Trail also passes through this site, which connects to the Lost Lake Trail.

This is also the location of the Big Obsidian Flow Ampitheater where ranger talks are featured throughout the summer. A current schedule of these lectures can be found at the Paulina Visitor Center

The site also features several picnic tables and a toilet.

Recreation Fee Site: Parking at this site requires a recreation pass. Passes are NOT available at this site, but can be purchased from Forest Service offices or vendors. Please check here for more information about recreation passes and where they can be purchased.

At a Glance

Fees: Day Use: $5/vehicle/day or valid recreation pass

Tour Bus Fee
- 15 people or less = $25
- 25 people = $50
- 25 people or more = $100

School/Education Groups: Please book your tour in advance with our forest partner, Discover Your Forest
Open Season: June - Late Fall
Usage: Medium-Heavy
Closest Towns: Bend, Sunriver, or La Pine
Water: No
Restroom: Vault Toilet
Passes: Recreation Fee Site: Parking at this site requires a $5 payment or a recreation pass. Recreation passes may be purchased at the Lava Lands Welcome Station or Newberry Caldera Welcome Station. Please check here for more information about recreation passes and locations where they can be purchased.  Acceptable passes include:
Information Center: Paulina Visitor Center

General Information

General Notes:

For more information call Lava Lands Visitor Center:

  • 541-593-2421


From Bend, OR: Travel 24 miles south on Highway 97, then 15 miles east on County Road 21.

Recreation Map

Map showing recreational areas. Map Information


Day Hiking

Along the trail there are seven interpretive signs which discuss the geology, biology, history, and archaeology of the Big Obsidian Flow.

Viewing Scenery

View a black glass (obsidian) and pumice lava flow.

Interpretive Areas

Seven interpretive signs describe the geology, biology, history, and archaeology of this lava flow.

Related Information

Recreation Areas

Recreation Activities


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