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Watch mountain peaks reflected in calm water and enjoy recreational activities, such as canoeing and hiking, at this picturesque lake.

Fascinating volcanic rocks suggest an enormous debris avalanche shook the area just a few centuries ago. Swim in the lake and hike around the mountains.

Hike the scenic trail connecting the larger Lake Helen to this charming basin, which is cold for much of the year and sometimes covered in ice.

Notice the rotten egg smell as you perch over the dome at the end of a trail that loops around the Cascade Range’s southernmost active volcano.

Boulders and lava were strewn across this forested valley during a 1915 volcanic eruption. Today enjoy its leisurely trail with audio exhibits.

Lassen Peak, Bumpass Mountain and Ski Heil Peak are among the rocky behemoths that frame the deep blue water of this scenic lake.