Mount Lassen

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  • Jedediah Smith, first white man to reach the Lassen Peak area

  • Peter Lassen leads immigrants past the peak to the Sacramento valley; Lassen Peak is later named after him

  • Grover Godfrey; first recorded ascent of Lassen Peak

  • Helen Tanner Brodt; first women to reach the top of the mountain

  • Theodore Roosevelt establishes the Lassen National Monument

  • Mount Lassen powerful eruption

  • Monument expanded to establish the Lassen National Volcanic Park

  • Naturalist Paul Schulz documents 30 steam vents at the summit of Lassen Peak

  • 13 seismometers placed to monitor continuing volcanic activity

  • Summit Trail closed after tragic accident

  • Summit Trail reopens