Photos displayed in this historic museum provide a window into the park’s appearance during the tumultuous eruptions and rock avalanches of the early 1900s.

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.

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

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.

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.