Volcanoes of Arizona

• San Francisco Volcanic Field--dormant
  • Sunset Crater--extinct (1068 A.D.)
• Uinkaret Volcanic Field--dormant 

Volcanoes of Colorado

• Dotsero Vents--extinct 

Volcanoes of Idaho

• Snake River Volcanic Plain--dormant
  • Idaho's Great Rift--dormant
    • Craters of the Moon Volcanic Field--dormant
    • King's Bowl Flows--extinct
    • Wapi Volcanic Field--dormant
  • Menan Buttes Volcanoes--extinct
  • Split Butte Volcano--extinct

Volcanoes of Nevada

• Lunar Crater Volcanic Field--extinct?

Volcanoes of New Mexico

• Albuquerque Volcanic Field--extinct
• Carrizozo Volcanic Field--dormant
• Jemez Volcanic Field--extinct
• Raton-Clayton Volcanic Field--dormant
• Red Hill Volcanic Field--extinct
• Taylor Volcanic Field--extinct
• Zuni-Bandera Volcanic Field--dormant

Volcanoes of Utah

• Bald Knoll Volcanic Field--dormant
• Black Rock Desert Volcanic Field--dormant
• Kolob Volcanic Field--dormant
• Markagunt Plateau Volcanic Field--dormant
• Santa Clara Volcanic Field--dormant

Volcanoes of Wyoming

• Yellowstone Plateau--dormant 

ACTIVE = reported eruption in last 5 years
active = eruption in last 50 years
dormant = likely to erupt again
extinct = not likely to erupt again