43°53′43″N 121°22′08″W / 43.895396°N 121.368917°W
| Lava River Cave | |
|---|---|
 High arched ceiling in Lava River Cave | |
| Location | Deschutes County, Oregon, United States |
| Length | 5,211 feet (1,588 m) |
| Geology | Basalt of Bend |
| Entrances | 2 |
| Access | Public |
The Lava River Cave near Bend, Oregon, is part of the Newberry National Volcanic Monument, which is managed by the United States Forest Service. At 5,211 feet (1,588 m) in length, the northwest section of the cave is the longest continuous lava tube in Oregon. While the cave's discovery in 1889 was officially credited to a pioneer hunter, the presence of obsidian flakes near the cave has led archaeologists to conclude that Native Americans knew about the cave long before settlers arrived in central Oregon.