Lassen USGS Hiking Medallion
$6.99
Members Price $5.94
Lassen Peak is the centerpiece of a landscape created by millennia of volcanic activity. The great Mt. Tehama, once comprising an 11 mile base, spawned numerous peaks. Lassen Peak began a series of more than 150 eruptions in May 1914, culminating in a great eruption in May 1915. Because of the area's rich and recent volcanic history, the area was established as a national park in 1916.
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