Get our free mobile appAccording to the Fort Worth Star-Telegram, Texas is home to hundreds of volcanoes. Are Texas Volcanoes Dormant or Extinct? According to Universe Today, "extinct" volcanoes haven't erupted for thousands of years. OK, so let's get back to these alleged hundreds of volcanoes in the state of Texas. But enough to give you plenty to do if you decide you want to take a road trip to visit some of these, thankfully, extinct volcanoes in Texas.