Harmony Falls is a submerged 120-foot, two-tier horsetail waterfall on Harmony Creek at Spirit Lake, Skamania County, Washington, in the blast zone of Mount St. Helens.
The falls
Before 1980, Harmony Falls dropped in two tiers with a combined height of about 120 feet. The May 18, 1980 eruption sent a debris avalanche into Spirit Lake that blocked its outlet and raised the water level, submerging the falls. The Northwest Waterfall Survey treats "Harmony Falls" as the official name and warns that it is sometimes applied incorrectly to small cascades farther upstream.
Getting there
The site lies within Mount St. Helens National Volcanic Monument in Gifford Pinchot National Forest, but it is not an accessible standing waterfall. Current Boundary Trail rules require staying on the trail and ban off-trail travel in this sensitive research landscape. As of the last official update, June 16, 2025, the Hummocks access to the Boundary Trail was open, but the Johnston Ridge Trailhead remained unreachable because an active landslide had closed State Route 504.
When to go
There is no viewing season, since the falls are underwater. Nearby blast-zone trails can be hot and dry in summer and windy and wet in fall.
On site
There is no base or top viewpoint. Trail rules ban off-trail travel, camping, stock and bicycles, and require pets on a six-foot leash. Swimming rules and any accident history for the submerged site are not documented.
Nearby
Waterfall 20 mi SE of Morton is about 1.1 miles away, Waterfall 20 mi SE of Morton about 1.3 miles away, and St. Helens Lake Falls about 2.6 miles away.
Distances are straight-line.