The Twin Buttes are two volcanic cinder cones located in the Cascade Range in Shasta County, California.

As of 2012, the Twin Buttes were still monitored by the United States Geological Survey for deformation, an indicator of pre-eruptive activity.

The Twin Buttes are two cinder cone volcanoes[3] that lie north of Lassen Peak[1] in Shasta County, California.

[7] Volcanism in the region encompasses a wide variety of eruption types, ranging from cinder cones to shield volcanoes.

[9] Two other basaltic andesite deposits from the chain have been described by the United States Geological Survey (USGS), which considers the Bidwell Spring chain as part of the Caribou Volcanic Field,[10][11] a system of 11 eruptive sequences between 200,000 and 100,000 years ago with vents aligned with faults that focused surface volcanic activity.

[13] Located in an area that was highly active during the Quaternary, the Twin Buttes volcanoes formed during the late Pleistocene.

[1] Basalt erupted from Twin Buttes forms part of the Bidwell Spring chain with an 40Ar/39Ar age of about 46,000 ± 3,000 years,[9] covering an area of 7.6 square miles (19.8 km2).

[3] While Twin Buttes last erupted during the late Pleistocene, the area is still monitored by the USGS given its proximity to Lassen Peak.