This gentle 2.3-mile loop trail explores the rolling hills, valleys and wetlands created by the debris avalanche of the 1980 eruption, complete with viewpoints and interpretive signs.

Hike into a vast, volcano-crafted moonscape in the (much-reduced) shadows of Mount St. Helens on this 10-mile out-and-back.

This challenging summit climb up Mount St. Helens leads hikers past waterfalls and lava flows to the edge of a smoldering crater.

STABLER to BIG MOSQUITO LAKE: Backpack through big huckleberry fields, visit an old Indian racetrack, and check out a hardened lava flow on this 33.7-mile leg that passes through Indian Heaven Wilderness.

BIG MOSQUITO LAKE to SHEEP LAKE: In-your-face glacier views of Mt. Adams dominate most of this 45.2-mile leg through beautiful subalpine meadows to the shores of a lovely ridgetop lake.

Discover spectacular wildflower displays and unrivaled views across the Columbia River Gorge on this popular summit hike.

Hike to this popular 2,400-foot high point above the Columbia River Gorge for misty waterfalls, spring wildflowers and cascade mountain views on a hardy 7-mile lollipop loop.

Trek above old lava fields to the summit of Huckleberry Mountain on this 10.2-mile round-trip ramble in Gifford Pinchot National Forest.

Climb the Northwest's tallest nontechnical volcano.

Follow the Pacific Crest Trail across wooded creeks and steep rock gardens to a broad summit overlooking the Columbia River Gorge on this strenuous 15-mile out-and-back.