Answer: lassen

AnswerCrossword Clue
LASSEN

California volcanic peak

LASSEN

California volcano

LASSEN

... Peak, only active volcano in U. S.

LASSEN
Only active volcano in U. S.
LASSEN
Only U. S. active volcano.
LASSENVolcano of the Sierra Nevadas.
LASSENPeak in California.
LASSENVolcano in California.
LASSENCalifornia volcano.
LASSENCalifornia peak
LASSENCascade peak
LASSENCalif. peak
LASSENCascades peak
LASSENCascade volcanic peak
LASSEN... Volcanic National Park
LASSENVolcanic park in California
LASSEN... Peak (active volcano in the Cascades)