Regional overview
The southern Washington Cascades are dominated by two very different volcanoes standing about 55 km apart. Mount St Helens (2,538 m / 8,328 ft) is the younger, smaller and far more famous of the pair: its 18 May 1980 lateral blast removed the entire north flank, felled forest across some 600 km², and left a horseshoe crater open to the north with a growing lava dome inside it. Mount Adams (3,742 m / 12,276 ft) is the opposite in almost every respect — the second-highest peak in Washington, a broad, glaciated, comparatively quiet andesite pile with a dozen glaciers on its flanks and none of St Helens’ celebrity.
The five hikes below balance both moods: the iconic Monitor Ridge summit climb, a volcanic-canyon and cinder-plain walk on the east side, a short blast-zone ecology loop, the standard Mount Adams summit climb, and a north-side Adams meadow and glacier-view route. The two summit routes are serious non-technical mountain days rather than casual hikes; snow, weather, and permit rules can put them out of range for ordinary walkers.
Current access and regulation notes
- Mount St Helens climbing permits are required for all summit climbs. The Mount St Helens Institute lists quotas and fees for the main climbing season; Recreation.gov is the controlling booking source.
- Entry into the Mount St Helens crater is prohibited — stay well back from corniced crater rims.
- Gifford Pinchot alerts in this pass reported Upper SR 504 / Spirit Lake Memorial Highway closed between mileposts 45.2 and 51 until further notice, with Johnston Ridge Observatory closed. The Hummocks access appears near the winter gate / closure area; confirm the exact open gate before travel.
- Mount Adams Climbing Activity Pass is required for climbers age 16+ above 2,134 m / 7,000 ft, per the USFS Mount Adams Area/Wilderness pages and Recreation.gov. Treat May 1 – September 30 as the conservative pass window unless the ranger district confirms otherwise (the Killen Creek trailhead page showed a slightly different range in this pass).
- Fire restrictions began 1 July 2026 on the Gifford Pinchot National Forest. Check current fire, smoke, road, and snow conditions before use.
See also: Mount Rainier · Stevens Pass.
Selection rationale
The five routes cover both volcanoes and the range of experience expected from the region: an iconic non-technical summit on St Helens, the best east-side walk on the same mountain, an accessible blast-zone loop, the standard non-technical route up Adams, and the north-side Adams meadow / glacier-view day. Harry’s Ridge, Coldwater Peak and Loowit Falls are all excellent but compromised in 2026 by the SR 504 closure or weekday trail order; they belong in a follow-up rather than the main five.
Summary table
| # | Hike | Start point | Type | Distance | Gain | Max elevation | Difficulty |
|---|---|---|---|---|---|---|---|
| 1 | Mount St Helens summit via Monitor Ridge | Climbers Bivouac | Out-and-back | 16.1 km / 10.0 mi | 1,372 m / 4,500 ft | 2,538 m / 8,328 ft | Hard |
| 2 | Ape Canyon to Plains of Abraham | Ape Canyon TH, Road 83 | Out-and-back | 17.7 km / 11.0 mi | 427 m / 1,400 ft | 1,280 m / 4,200 ft | Moderate–hard |
| 3 | Hummocks Trail | Hummocks / Boundary TH, SR 504 | Loop | 3.9 km / 2.4 mi | 76 m / 250 ft | 777 m / 2,550 ft | Easy |
| 4 | Mount Adams South Climb | South Climb / Cold Springs TH | Out-and-back | 19.3 km / 12.0 mi | 2,042 m / 6,700 ft | 3,742 m / 12,276 ft | Very hard |
| 5 | Killen Creek to High Camp | Killen Creek TH | Out-and-back | 16.1 km / 10.0 mi | 701 m / 2,300 ft | 2,103 m / 6,900 ft | Hard |
Essential day-hikes
1. Mount St Helens summit via Monitor Ridge
Snapshot
Itinerary. From Climbers Bivouac, follow the Monitor Ridge summer route through forest and onto open volcanic boulder slopes, then climb pumice and blocky ridge terrain to the crater rim. The crater itself is closed; the legal summit objective is the rim area outside the closure.
Why it is essential. The defining day objective on Mount St Helens — direct experience of the 1980 blast landscape, views into the crater and lava dome, and a rim panorama over Adams, Rainier, Hood and the southern Cascades.
Equipment. Climbing permit, parking pass, gloves for boulder fields, 3–4 L water, layers, sun and wind protection, navigation, headlamp, food, first-aid kit; helmet is optional but useful around loose rock. MSHI notes that beacon / probe / shovel, ice axe, snowshoes or crampons may be needed in snow conditions. Blue bags are required for waste.
Hazards and notes. Loose rock, steep pumice, no shade or water high on the route, rapid weather changes, poor visibility, snow and ice, corniced crater rim, volcanic gas / steam areas, and the strict crater-entry prohibition. The climbing permit does not include parking; accepted passes at Climbers Bivouac include the Northwest Forest Pass or the interagency pass. No public transport verified.
GPX / route file. No reusable GPX / KML verified. Official planning pages: Mount St Helens Institute — Climb; Recreation.gov — climbing permit. OSM base for manual tracing: OSM search — Monitor Ridge / Climbers Bivouac.
Sources. MSHI — Climb; MSHI — Current Conditions; Recreation.gov.
2. Ape Canyon to Plains of Abraham
Snapshot
Itinerary. Climb from the Ape Canyon trailhead through forest beside a lahar-affected drainage, then emerge into open volcanic terrain with views of Mount St Helens, Mount Adams and Mount Rainier. The normal day-hike objective is the canyon rim / Plains of Abraham area; parties can extend north on the Loowit Trail only if time and conditions allow.
Why it is essential. The best moderate-to-hard east-side St Helens walk — old forest gives way to cinder plains, blast-zone recovery, big volcano views and the stark edge of Ape Canyon.
Equipment. Trail shoes or boots, sun and wind protection, layers, water, navigation, headlamp; poles are helpful on loose volcanic tread.
Hazards and notes. Mountain-bike traffic, loose volcanic tread, exposed open terrain, no dogs allowed, limited shade and water, rapidly changing weather. Access: Woodland → SR 503 → Lewis River Road → FR 90 → FR 83. National Park Pass or Northwest Forest Pass required. No public transport verified.
GPX / route file. No reusable GPX / KML verified. Reference: WTA — Ape Canyon. OSM base: OSM search — Ape Canyon Trail 234.
Sources. WTA — Ape Canyon.
3. Hummocks Trail
Snapshot
Itinerary. Follow the loop through hummocky landslide deposits, ponds, wetlands and young forest, with an optional short connection to the Boundary Trail junction for a classic Mount St Helens view.
Why it is essential. The accessible short walk that explains the 1980 debris-avalanche landscape better than any long summit route — hummocks, wetlands, recovering vegetation and open volcano views, in an hour or two.
Equipment. Trail shoes, rain and wind layer, water, sun protection; binoculars useful for birds and volcano views.
Hazards and notes. Stay on trail to protect recovering habitat. WTA notes no dogs and no toilet at the trailhead. During this pass, Gifford Pinchot alerts reported Upper SR 504 closed beyond the Hummocks-area gate toward Johnston Ridge — confirm the exact open gate before travel. No public transport verified.
GPX / route file. No reusable GPX / KML verified. Reference: WTA — Hummocks. The USFS Mount St Helens NVM map (2019) on Commons is public domain but not a GPX. OSM base: OSM search — Hummocks Trail 229.
Sources. WTA — Hummocks; Gifford Pinchot NF — alerts.
4. Mount Adams South Climb
Snapshot
Itinerary. From South Climb trailhead, follow the South Climb route past the Round the Mountain Trail junction and toward the Lunch Counter, then climb the broad south-side slope to Pikers Peak and the true summit of Mount Adams. The route is non-roped in standard summer conditions but still demands mountaineering judgment, navigation and snow / ice competence when snow remains.
Why it is essential. The standard route up Washington’s second-highest peak and the region’s most important high-volcano day climb — treated here as a very strenuous day objective for fit, acclimatised parties.
Equipment. Mount Adams Climbing Activity Pass when above 2,134 m / 7,000 ft in the pass season; parking pass or day-use fee as applicable; navigation, headlamp, glacier glasses / sunglasses, sun protection, 3–4+ L water capacity, layers, wind shell, gloves; helmet optional; ice axe and crampons / microspikes when conditions require; required waste pack-out bags.
Hazards and notes. Very high elevation, altitude illness, long descent, snow and ice, glissade hazards, whiteout navigation, thunderstorms, rockfall, no potable water. USFS notes steep and narrow road access unsuitable for RVs or trailers, small quickly-filling parking, vault toilets. Recreation.gov warns that all summit routes require alpine mountaineering proficiency. No public transport verified.
GPX / route file. No reusable GPX / KML verified. Reference: WTA — Mount Adams South Climb. Official pages: USFS — South Climb Trailhead; Recreation.gov — climbing pass. OSM base: OSM search — South Climb 183.
Sources. WTA — Mount Adams South Climb; USFS — Mount Adams Area; USFS — Mount Adams Wilderness.
5. Killen Creek to High Camp
Snapshot
Itinerary. Follow Killen Creek Trail #113 from the north-side trailhead through lodgepole forest to the Pacific Crest Trail junction, continue onto High Camp Trail #10, and climb through increasingly open terrain to meadows and viewpoints below the Adams Glacier. Do not continue onto glacier terrain without mountaineering equipment and skills.
Why it is essential. The best north-side Adams day hike — quieter than the South Climb, with wildflower meadows, close views of Adams Glacier, and a strong sense of the mountain’s glaciated bulk.
Equipment. Sturdy footwear, poles, navigation, water treatment, layers, sun and insect protection, headlamp; traction if snow remains. Climbing pass required if continuing above 2,134 m / 7,000 ft in the pass season.
Hazards and notes. Rough road access, dusty lower forest, lingering snow, route-finding near High Camp, loose or rocky ledges, rapidly changing weather, glacier hazards if continuing beyond the hiking objective, no potable water, no restroom at the trailhead. USFS lists gravel parking for about 8 vehicles. Access is via Trout Lake → FR 23 → FR 2329, or Randle via FR 25 / FR 23 depending on conditions. No public transport verified.
GPX / route file. No reusable GPX / KML verified. Reference: WTA — Killen Creek. Official page: USFS — Killen Creek Trailhead. OSM base: OSM search — Killen Creek 113.
Sources. WTA — Killen Creek; USFS — Killen Creek Trailhead; USFS — Mount Adams Wilderness.
Routes considered but excluded as out of scope
- Harry’s Ridge, Coldwater Peak and Loowit Falls. Excellent but currently compromised by the SR 504 upper closure and weekday trail order; revisit once access is restored.
- Norway Pass to Mount Margaret. Strong Mount Margaret Backcountry day, retained as a follow-up rather than the main five.
- Sleeping Beauty Peak. A short steep viewpoint hike; useful pairing with Killen Creek but not essential.
- Full Loowit Trail circumnavigation. A backpacking objective, not a day hike.
- Non-standard glacier routes on Mount Adams (Adams Glacier, North Ridge). Mountaineering objectives requiring roped travel and glacier equipment.
Further reading
- Mount St Helens Institute — Climb — canonical climbing information, quotas, gear.
- Mount St Helens Institute — Current Conditions — trail, road and weather updates.
- Gifford Pinchot National Forest — alerts — active closures and fire restrictions.
- USFS — Mount Adams Area and USFS — Mount Adams Wilderness.
- Sister catalogue: USA — Mount Rainier for the neighbouring giant to the north.
- Sister catalogue: USA — Goat Rocks for the alpine ridge country between Rainier and Adams.
Missing data and follow-up work
- No official or clearly reusable GPX / KML files were verified for these five hikes. Route-source links are provided for manual GPX creation or later legal review.
- WTA route geometry and map-download reuse terms are unresolved.
- Elevation loss is not separately sourced for most routes; assumed symmetric on out-and-backs.
- Mount St Helens SR 504 / Johnston Ridge / Hummocks access should be rechecked immediately before publication or travel because the closure gate position can change.
- Killen Creek has a source discrepancy on Mount Adams climbing-pass date ranges: USFS area / wilderness pages and Recreation.gov support 1 May – 30 September, while the trailhead page seen in this pass showed a different range.
- Killen Creek / High Camp-specific reusable photo not verified — the current figure is a High Camp / Adams Glacier image sourced separately, but a Killen Creek route-specific shot would be a better fit if one becomes available.