West Lewis National Scenic Area wilderness guide
National Scenic Area · Washington
Backpacking Guide

West Lewis National Scenic Area

West Lewis National Scenic Area preserves a rugged segment of the western flanks of Mount St. Helens, offering extensive wilderness recreation amid dense forests, volcanic landscapes, and pristine river corridors.

National Scenic Area110,0004+ Trails

Designation

National Scenic Area

Total Wilderness Area

110,000

Elevation / Terrain

Diverse Wilderness

Field Editorial Guide

About West Lewis National Scenic Area

West Lewis National Scenic Area preserves a rugged segment of the western flanks of Mount St. Helens, offering extensive wilderness recreation amid dense forests, volcanic landscapes, and pristine river corridors.

Wilderness Landscape & Natural Heritage

West Lewis National Scenic Area, located in southwestern Washington within the Gifford Pinchot National Forest, was created to protect the landscape along the western side of Mount St. Helens after the 1980 eruption. The area spans steep volcanic terrain characterized by lava flows, volcanic ash deposits, and ancient forest stands recovering from the eruption’s impact. The region ranges from moist lowland forests to subalpine meadows and ridges, fostering a diverse ecological setting with species such as Douglas fir, western hemlock, Pacific silver fir, and wildlife including black bears, elk, and spotted owls. Key recreation opportunities include hiking, backpacking, horseback riding, and waterfall viewing along trails that provide access to old-growth groves, volcanic formations, and river valleys. Notable landmarks include the Ape Canyon trailhead area and the Hamilton Canyon, which features impressive scenery and solitude. Its relatively remote location means visitors often experience solitude in scenic wilderness, with seasonal wildflower displays and plentiful wildlife sightings. The area appeals to outdoor enthusiasts seeking moderately challenging trails with volcanic geology and vibrant forest ecosystems. Established as part of post-eruption recovery measures, the scenic area ensures long-term conservation of the landscape’s natural and cultural resources. Visitors benefit from multiple trailheads and primitive camping sites while enjoying vistas of Mount St. Helens, Spirit Lake, and surrounding Cascade peaks.

Field Guide · National Scenic Area

Notable Landscape Features

Iconic geological landmarks, alpine vantage points, and distinctive ecosystems in West Lewis National Scenic Area.

Feature 1

Ape Canyon Lava Tubes

Volcanic lava tubes formed by past eruptions that can be explored via trails, offering insight into the area's volcanic geology.

Feature 2

Hamilton Canyon

A secluded valley rich with waterfalls, dense forest, and diverse plant communities providing a peaceful wilderness experience.

Feature 3

West Fork Tilton River

A pristine river corridor supporting salmon runs and providing prime fishing and wildlife viewing opportunities.

Key Wilderness Highlights

Ape Canyon Trail – access to historic volcanic lava tubes and rugged terrainHamilton Canyon – remote wilderness with wildflower meadows and cascading streamsOverlooks offering dramatic views of Mount St. Helens and Spirit LakeDense old-growth stands with diverse flora and fauna
Iconic Trails & Natural Landmarks

Top Trails & Sights in West Lewis National Scenic Area

Discover summit paths, alpine loops, and natural wonders within this protected wilderness.

Moderate10.5

Ape Canyon Trail

Winding through lava fields and dense forest, this trail leads to the historic Ape Canyon lava tubes and striking volcanic terrain.

Moderate8.2

Hamilton Canyon Trail

A quieter trail following the canyon’s streams, notable for waterfalls, wildflowers, and peaceful forest scenery.

Easy7.0

West Fork Tilton River Trail

Gentle river trail popular for fishing, wildlife viewing, and easy access to natural river habitats.

Challenging6.5

Goat Mountain Trail

A challenging ascent offering panoramic views of Mount St. Helens and the surrounding Cascades.

Wilderness Recreation

Outdoor Adventures in West Lewis National Scenic Area

Explore curated guides for top outdoor sports, trail networks, and wilderness activities.

Activity Spotlight

Backpacking in West Lewis National Scenic Area

View Full Park Guide

West Lewis National Scenic Area offers exceptional terrain and routes for backpacking, featuring established access paths, scenic vistas, and protected wilderness territory.

Other Activities in West Lewis National Scenic Area:HikingCampingWildlife ViewingHorseback RidingPhotographyBird Watching
The Ranger Station

Visitor Logistics & Essential Planning

Everything you need to know about entrance passes, seasons, visitor centers, road transit, and wildlife safety in West Lewis National Scenic Area.

Passes & Fees

Entrance Requirements & Interagency Passes

No entrance fees; free public access managed by the U.S. Forest Service.

Wilderness Checklist

Carry paper topographic map & compass in remote zones.
Store all food and scented items in approved bear canisters.
Check wildfire / smoke advisories before backcountry departure.
Pack out everything you pack in (Leave No Trace).
Wilderness Stays

Camping & Overnight Stays in West Lewis National Scenic Area

Frontcountry developed campgrounds, backcountry wilderness permit guidelines, and starry-night camping advice.

Hamilton Canyon Campground

A small, secluded campground near Hamilton Canyon offering basic facilities surrounded by forest and close to hiking trails.

Ape Canyon Group Campground

Group campsite accessible from Ape Canyon Trailhead, suited for larger parties wanting direct access to volcanic landscapes.

Adventure Basecamps

Gateway Towns Near West Lewis National Scenic Area

Stay, dine, and gear up in these mountain towns and scenic desert basecamps surrounding the park.

Mount St. Helens, Washington, Washington
Gateway Basecamp

Mount St. Helens, Washington, Washington

Mount St. Helens offers epic hiking, mountain biking, paddling, and winter sports across a dramatically changed volcanic landscape. Visitors can explore crater views, lava caves, and regenerating forests for a truly unique outdoor adventure.

Late Spring through Early FallExplore Town
Castle Rock, Washington, Washington
Gateway Basecamp

Castle Rock, Washington, Washington

Castle Rock, WA is your launchpad for exploring Mount St. Helens and its scenic surroundings. With hiking, fishing, and camping, it offers plenty of adventure for outdoor enthusiasts.

Randle, Washington, Washington
Gateway Basecamp

Randle, Washington, Washington

Randle, WA is a thrilling adventure hub for travelers and outdoor enthusiasts. With access to the stunning landscapes of the Cascades, it's perfect for hiking, biking, and winter sports.

Summer and Early FallExplore Town