Altrusa Park Trail, also known as Mt. Solo Trail, runs 1.3 miles along the slough area behind homes in this Mt. Solo development. This hidden gem on the outskirts of town is a lovely nature trail with access to Altrusa Park, which features a playground, basketball courts, picnic shelter and tables.
Highlights: Dogs allowed · Picnic tables · Playground
Ape Canyon is one of the most rewarding hikes on the south side of Mount St. Helens, offering a steady climb from deep forest into wide-open volcanic terrain with expansive views of Mount St. Helens, Mount Adams, and Mount Rainier. This out-and-back route is about 11 miles roundtrip with roughly 1,400 feet of elevation gain, making it a strong choice for hikers looking for a fuller day on the mountain without committing to a summit climb.
The trail begins near Lava Canyon and follows the edge of the Muddy River lahar zone before climbing through one of the remaining old-growth forest stands on Mount St. Helens. As you gain elevation, the dense forest gives way to open slopes, light-colored cinders, summer wildflowers, and increasingly dramatic volcanic views. Near the upper end of the hike, the landscape opens onto a broad plain and the route reaches the edge of the canyon itself before continuing toward the Loowit Trail.
What makes Ape Canyon especially memorable is the contrast. You begin in shaded evergreens and finish in a stark, beautiful volcanic landscape that feels almost otherworldly. It is one of those Mount St. Helens hikes that gives visitors a strong sense of both the mountain’s surviving forest and the raw terrain shaped by eruption and mudflow. The trail is also popular with mountain bikers, so hikers should stay aware and share the trail carefully.
For planning purposes, the trailhead sits near Cougar, Washington, at approximately 46.165526, -122.09105. Parking is limited, with space for about seven vehicles at the trailhead, and overflow parking may be available nearby at Lava Canyon or Lahar Viewpoint. A Digital Day Pass, Northwest Forest Pass, Interagency Pass, or the posted day-use fee is required. Potable water is not available at the trailhead.
Getting there: From Cougar, take Lewis River Road east as it becomes Forest Road 90, then turn left onto Forest Road 83 and continue about 8.4 miles to the Ape Canyon Trailhead near the end of the road. Forest Road 83 is paved, but the Forest Service notes that it can be rough, so drive with caution.
Call to action: Add Ape Canyon to your Visit Mt. St. Helens itinerary for a hike that delivers old-growth forest, volcanic scenery, and some of the most impressive south-side views in the monument.
Current seasonal note: The Forest Service currently lists the Ape Canyon trailhead as closed for winter. As of April 1, 2026, Forest Road 83 is gated at Marble Mountain Sno-Park due to snow, so the trail cannot currently be accessed by vehicle. The listed main season of use is June through October.
Step beneath the forest floor and discover one of the most unique adventures in the Mount St. Helens region. Ape Cave is a massive lava tube formed by ancient volcanic flows on the south side of Mount St. Helens, and at about 2.5 miles long, it is considered the third longest lava tube in North America. This unforgettable stop blends geology, adventure, and forest scenery into one of the area’s most memorable outdoor experiences.
The experience begins with a short paved path from the parking area to the cave entrance, where a stairway drops into a cool, dark underground world. From there, visitors can choose between two very different routes. The Lower Cave is the easier option, offering a relatively gentle out-and-back walk that is well suited for families and casual explorers. The Upper Cave is more challenging, with rocky footing, lava-formed obstacles, an 8-foot lava fall, and an exit ladder that brings you back to the surface for a forest hike to return to the main entrance.
Ape Cave is more than a hike. It is a chance to experience Mount St. Helens from the inside out. The cave stays around 42 degrees year-round, making it a refreshing summer adventure but one that requires preparation in every season. Visitors should bring warm layers and at least two reliable light sources per person, since there is no lighting inside the cave and cell phone flashlights are not considered adequate.
To help protect this fragile volcanic environment, visitors should avoid touching the cave walls or ceiling, and pets, smoking, camping, alcohol, and food or drinks other than water are not allowed inside. During the open season, timed entry reservations are required per vehicle, and parking also requires a Northwest Forest Pass, Interagency Pass, or day pass.
Whether you are looking for a family-friendly lava tube walk or a more adventurous underground scramble, Ape Cave offers a one-of-a-kind way to explore the volcanic story of Mount St. Helens. It is one of those places that feels equal parts trail, cave, and natural wonder.
Trail details: Ape Cave Trail #239, near Cougar, Washington. Main trailhead coordinates: 46.108645, -122.210387. The cave is reached via Forest Road 8303, roughly 9 miles east of Cougar.
Call to action: Add Ape Cave to your Mount St. Helens itinerary and experience one of the most unusual hikes in Washington, where volcanic history comes to life beneath your feet.
Current seasonal note: As of April 8, 2026, Ape Cave is in its winter closure period. The Forest Service page lists the site as seasonally closed from November 1 to May 17, while Recreation.gov currently says the 2026 summer season reopens on Friday, May 22 and requires timed tickets.
Trail Overview
Birth of a Lake Interpretive Trail is a short, scenic walk at Coldwater Lake that gives visitors an easy way to experience one of the most dramatic landscape changes caused by the 1980 eruption of Mount St. Helens. This accessible boardwalk trail follows the lakeshore and uses interpretive displays to explain how the eruption’s debris avalanche dammed Coldwater Creek and created an entirely new lake.
Trail Stats
The trail is about 1.2 miles round trip with little to no elevation gain, and it is considered easy. The trailhead coordinates are approximately 46.2921, -122.2663.
What to Expect
Expect a smooth, family-friendly walk with lake views, wetlands, interpretive signs, and a close look at how nature has recovered in the blast zone. The route is stroller- and wheelchair-friendly, making it one of the best quick stops for visitors who want scenery and a bit of Mount St. Helens history without a strenuous hike.
Directions to the Trailhead
From Castle Rock, drive east on State Route 504 / Spirit Lake Highway for about 45 miles to the Coldwater Lake Recreation Area. The trail begins from the picnic area at the south end of Coldwater Lake.
Know Before You Go
There is no trail fee listed for the Birth of a Lake Interpretive Trail area. Current official conditions note that Upper SR 504 remains closed beyond milepost 45.2, but Coldwater Lake Recreation Area remains accessible. The Forest Service also notes that, as of January 27, 2026, restrooms are open on the boat launch side, while the picnic-side restrooms remain closed for repairs.
Call to Action
If you want an easy, educational stop near Toutle with beautiful lake views and a direct connection to the story of Mount St. Helens, Birth of a Lake Interpretive Trail is a great addition to your visit.
A Window into Volcanic Renewal
Location: Coldwater Lake Picnic & Boating Area, Mount St. Helens National Volcanic Monument, WA
Distance: Approx. 0.5 – 1.2 miles round-trip (depending on route)
Elevation Gain: 50 feet total
Highest Elevation: 3,900 feet
Trail Type: Out-and-back and short loops (boardwalk/paved)
Difficulty: Very Easy – ideal for all ages and ability levels
Open Season: Year-round (weather and road conditions permitting)
Family-Friendly: Absolutely – stroller-friendly, safe for young kids
ADA Accessible: Yes – boardwalk and paved sections
Pets: Not allowed
Pass Required: $5 per vehicle or valid Recreation Pass
Trail Overview
This charming boardwalk trail runs along the shores of Coldwater Lake—the direct result of Mount St. Helens' 1980 eruption, which dammed Coldwater Creek and carved out the lake in its path. Interpretive displays along the route vividly recount that transformation, guiding hikers through both geologic history and ecological resurgence.
Along the path, you might spot intriguing features like beaver-chewed trees, small trout splashing on the water's surface, and marshy wildlife activity to observe and enjoy.
A floating deck or footbridge offers serene lake views—especially magical on calm, sunny days when the surrounding hills reflect perfectly in the water.
Visitor Info & Amenities
Located right by the Coldwater Lake Recreation Area, the trailhead offers:
- ADA-accessible boardwalk
- Picnic tables, restrooms, drinking water, and parking
- Boat launch and accommodations for non-motorized boating and light recreation near the lake
- No pets off-leash, no fishing or swimming allowed along the trail; all rules are in place to preserve this sensitive area
There’s no entry fee required specifically for the trail, though day-use fees may apply for the broader area (e.g., $5/vehicle or valid Recreation Pass)
Why You’ll Love It
- Educational & Immersive: Learn firsthand how Mount St. Helens shaped the landscape—and how life rebounded.
- Accessible to All: Easy, paved paths and gentle terrain mean nearly anyone can enjoy this trail.
- Short & Rewarding: A quick yet deeply satisfying hike—perfect for families, short stops, or combining with other nearby trails like the Lakes Trail.
Ideal for a quick picnic, family adventure, or a peaceful reflective stroll, the Birth of a Lake Trail tells a powerful story of destruction, transformation, and resilience. Want a shorter tagline or a version tailored for prints or brochure use? Just say the word!
Longitude: -122.266096
Directions
From Castle Rock, drive State Route 504 east 43 miles. Stay right where State Route 504 forks towards the Johnston Ridge Observatory. Continue for 1 mile, turn left at Coldwater Lake.
Boundary Trail #1 to Norway Pass (SR 504 Side)
- Location: Near Coldwater Lake, off SR 504, Mount St. Helens National Volcanic Monument.
- Distance: 7 miles one-way (about 14 miles round trip).
- Difficulty: Moderate to Challenging – steady uphill climb with some rocky sections.
- Elevation Gain: Around 2,500 feet to 4,200 feet at Norway Pass.
- Best Season: Late spring to fall (May to October), avoid winter and early spring due to snow.
Trail Highlights:
- Views: Great views of Mount St. Helens, Spirit Lake, and the blast zone.
- Wildlife: Look for elk, deer, and bears.
- Trail Type: Point-to-point (out-and-back).
- Family-Friendly: Not ideal for young kids; better for experienced hikers.
Things to Know:
Shuttle: If doing a one-way hike, consider arranging a shuttle.
Trail Access: Start at Coldwater Ridge or Coldwater Lake.
Water: Bring plenty of water, there are no reliable water sources along the trail.
Weather: Weather can change quickly; bring layers.
This 0.25 mile loop circles Cloney Park playground and field, where you might catch some local youth soccer practices, or find some painted rocks hidden by our active local rock painting community. Cross 28th Avenue for access to Cloney Skate Park and the BMX track. There's fun for all ages in this little park network!
Trail Description
Coweeman River Trail at Tam O’Shanter Park is an easy, scenic walk in Kelso that offers a peaceful way to enjoy the outdoors without venturing far from town. This relaxed out-and-back trail follows the river through a quiet mix of trees, open green space, and gentle natural views, making it a great choice for families, casual walkers, and anyone looking for a simple outdoor escape. With easy terrain and access from one of Kelso’s best-loved community parks, it is a great stop for stretching your legs, enjoying fresh air, or adding a light adventure to your day near Mt. St. Helens. The AllTrails listing describes it as an easy out-and-back route of about 2.4 miles with minimal elevation gain.
Ready to Explore?
Whether you are looking for a quick nature walk, an easy family outing, or a quiet place to slow down and enjoy the river, Coweeman River Trail is a great choice. Bring your walking shoes, pack a drink, and enjoy one of Kelso’s most approachable outdoor spots.
Directions to the Trailhead
The trail can be accessed from Tam O’Shanter Park in Kelso, Washington. The park is located just south of Kelso High School along the Coweeman River. For the easiest route, enter Tam O’Shanter Park, Kelso, WA into your preferred map app and park in the main lot near the trail access area.
Latitude / Longitude
46.1339, -122.9054
Trail Description
Cowlitz River Trail is an easy, mostly flat riverside route in Kelso that offers a simple way to enjoy fresh air, open views, and a relaxed walk along the water. This out-and-back trail is about 4.9 miles with very little elevation gain, making it a great option for walkers, runners, casual bike rides, and families looking for an accessible outing. With a mix of gravel and paved asphalt, the trail is approachable for a wide range of visitors and provides a peaceful way to experience the river at your own pace. Open year-round, it is a great place to enjoy a longer walk while taking in a different side of Kelso.
Ready to Explore?
If you are looking for an easygoing trail near Mt. St. Helens, Cowlitz River Trail is a great pick. It is an inviting place to enjoy the river, get in a steady walk, and spend time outdoors at your own pace.
Directions to the Trailhead
A common access point is from the north end near Cowlitz Gardens Road in Kelso, Washington. For the easiest route, enter Cowlitz Gardens Road, Kelso, WA into your preferred map app and look for access near the north end of the trail.
Latitude / Longitude
The safest trailhead is the north-end access off Cowlitz Garden Lane / Cowlitz Gardens Road in Kelso.
This popular paved accessible interpretive trail starts at the Johnston Ridge Observatory observation deck, ascending by way of paved switchbacks to the top of a ridge. This trail is a steep grade, and some individuals may need assistance. Interpretive signs at this site record the May 18, 1980, eruption and volcanic history of the area. Enjoy impressive views of Mount St. Helens, the blast zone, Mount Adams, and the Mount Margaret Backcountry. The trail continues eastward then descends to the junction with Boundary Trail #1. By staying on the paved path, you will return to the main parking lot.
Harmony Trail #224 – Hike Into the Heart of a Volcanic Legacy
Location: Mount St. Helens National Volcanic Monument, Gifford Pinchot National Forest
Distance: 2 miles round-trip (1 mile one-way)
Elevation Change: 600–700 feet descent (and same back up)
Difficulty: Moderate (steep at the start)
Trail Type: Out-and-back
Open Season: Late spring through fall (snow-dependent)
Family-Friendly: Yes – for older children or those comfortable with a short, steep hike
Pets: Not allowed
Pass Required: $5 per vehicle or valid Recreation Pass
Trail Overview
Step into a living laboratory of renewal on Harmony Trail #224, a stunning descent through the blast zone of Mount St. Helens that leads to the shores of Spirit Lake—one of the most iconic and restricted areas in the monument.
Once home to the now-submerged Harmony Falls Lodge, the area was completely transformed by the 1980 eruption. Today, this steep but rewarding 1-mile trail (2 miles round-trip) offers the only legal public access to Spirit Lake’s shoreline. Along the way, you’ll pass through young alder stands and wildflowers thriving in the volcanic soil, with breathtaking views of the lake and Mount St. Helens rising above it.
The lake’s surface is still littered with floating logs—remnants of the massive debris flow triggered by the eruption. Standing at the water’s edge, you’ll experience the raw aftermath of a geologic event that reshaped the region.
About Harmony Trail
Named for a now-submerged waterfall (Harmony Falls), this steep, one-mile trail begins at Harmony Falls Viewpoint and ends on the shore of Spirit Lake. The semi-barren hillside you descend, and surrounding landscape was blanketed by old growth forests, pre-eruption. Huge trees were swept away or toppled by the lateral blast of the May 1980 eruption.
On May 18th, the north side of St. Helens collapsed, slamming into Spirit Lake. The resulting “tidal” wave surged 800 feet up the opposite shore, dragging toppled trees into the lake as the water returned. Those trees still float on the lake surface. The avalanche filled the base of the lake, raising the lake level 200 feet, and submerging Harmony Falls, and the site of rustic Harmony Falls Lodge.
Why Hike Harmony Trail
Family-Friendly: A great challenge for adventurous families with older kids; shorter in distance but steep.
Geological Immersion: Hike directly into the historic blast zone of Mount St. Helens.
Unique Access: Reach the only permitted spot where visitors can stand at Spirit Lake’s shoreline.
Photo-Worthy: Dramatic Lake and volcano views, wildflowers, and striking contrasts in the landscape.
One of our longest fully paved trails at 1.3 miles, this nicely landscaped, well-lit path runs the entire distance of the slough between Oregon Way and Douglas Street. With access to Archie Anderson Park, this is a great path for a family stroll or those seeking a safer, greener, bike-friendly alternative to Industrial Way traffic.
Trail Overview
Hummocks Trail is one of the best short hikes near Toutle for visitors who want a close-up look at the landscape reshaped by the 1980 eruption. This easy loop winds through rolling mounds, wetlands, young forest, and open viewpoints, with excellent views of Mount St. Helens and the North Fork Toutle River valley.
Trail Stats
About 2.5 miles round trip, 250 feet of elevation gain, and generally rated easy. The trailhead coordinates are 46.2869, -122.2717.
What to Expect
This family-friendly loop takes hikers through the strange, uneven “hummocks” left behind when the north flank of Mount St. Helens collapsed in 1980. Along the way, you’ll pass ponds, wetlands, recovering forest, and interpretive signs that help tell the story of how this once-barren blast zone became alive again. One of the best volcano views comes near the junction with the Boundary Trail, roughly a half mile from the trailhead.
Directions to the Trailhead
From Castle Rock, drive east on State Route 504 / Spirit Lake Highway for about 43 miles. Stay right at the fork signed for Johnston Ridge, continue about 2 more miles, and look for the signed Hummocks / Boundary Trailhead on the right.
Know Before You Go
The Forest Service currently lists no fee at the Hummocks Trailhead. Even with the ongoing SR 504 closure beyond milepost 45.2, Hummocks Trail remains open. The closure affects vehicle access farther up the highway, so Johnston Ridge Observatory and Loowit Viewpoint are not accessible by car, but the Hummocks Trail itself is still open for hiking.
Call to Action
If you’re looking for an easy Mount St. Helens-area hike with big scenery, fascinating geology, and a trail that works well for families, Hummocks Trail is a must-stop on your Toutle adventure.
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