Dotsero, United States

Maar · 2,230 m (7,316 ft) · US-Colorado

Dotsero is a maar in the United States, 2,230 m (7,316 ft) high. Its last known eruption: bC (Holocene). NOAA records no significant eruption here.

Dotsero on the map

Dotsero and the volcanoes within 300 km, colored by when each last erupted.

Since 1964
1900 to 1963
1800s
AD 1 to 1799
Before AD 1, or undated

Open the live map with volcanic ash advisories

Now

From the USGS Volcano Hazards Program, read 15:32 UTC. USGS threat ranking: Moderate Threat.

Unassigned / Unassigned Yellowstone Volcano Observatory rates Dotsero at alert level Unassigned, aviation color code Unassigned.

The observatory’s page

The volcano

Type: Maar
Elevation: 2,230 m (7,316 ft)
Country: United States
Region: US-Colorado
Summit: 39.661° N, 107.036° W
Last known eruption: BC (Holocene)
Holocene activity known from: Radiocarbon
Smithsonian volcano number: 328010

Significant eruptions

NOAA records eruptions that killed, did damage, were very large, or set off a tsunami or earthquake.

None on record.

Around it

The volcanoes within 300 km.

Earthquakes near Dotsero Volcanic ash advisories on the live map

Sources

Volcanoes and significant eruptions from NOAA’s National Centers for Environmental Information, Global Historical Hazard Database, cited as NCEI/WDS, doi:10.7289/V5PN93H7. Public domain. Read 2026-09-24. Alert levels, color codes and notices from the USGS Volcano Hazards Program and its observatories, public domain. Volcano numbers are the Smithsonian Institution’s Global Volcanism Program’s.