Lava Canyon Falls drops 200 feet (61 meters) along the Muddy River in Skamania County, Washington.

Lava Canyon Falls was discovered after the 1980 eruption of Mount St. Helens, from which a lahar and flood scoured out a canyon that had been filled with dirt and mud for 1,800 years. The Muddy River's course was redirected to that canyon as a result of the lahar and the floods, and it drops 1,400 feet (430 meters) in 2 miles (3.2 km). Lava Canyon Falls is the largest, 200-foot sheer drop.

On the southeast side of Mount St. Helens National Volcanic Monument at 46°10′12″N 122°04′57″W / 46.1701°N 122.0826°W / 46.1701; -122.0826, at 2,440 feet.

• "Northwest Waterfall Survey". Northwest Waterfall Survey. 2020-06-07. Retrieved 2023-04-23.
• "Lava Canyon Falls". Archived from the original on 2008-10-11. Retrieved 2023-08-20.
• "Recreational Opportunities in Gifford Pinchot National Forest". Archived from the original on 2005-12-04. Retrieved 2023-08-20.

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