Snoqualmie Falls is 100 feet taller than Niagara, and the best part is buried underneath it
Everybody knows Niagara. Fewer people know that a waterfall 30 miles from Seattle drops 100 feet farther. Snoqualmie Falls plunges 268 feet, while Niagara’s Horseshoe Falls comes in at 167.
And that’s not even the most interesting thing about this place. Wait until you hear what’s hiding in the rock behind it.
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The power plant under the waterfall
In the 1890s, engineers built Plant 1 inside a cavern roughly 270 feet below the surface. It’s recognized as the world’s first completely underground powerhouse, and it earned an American Society of Civil Engineers landmark designation in 1981.
Here’s the wild part: it’s still part of the working hydroelectric system today. Puget Sound Energy runs the site, and the whole project generates enough power for more than 13,000 homes. A waterfall that gets 1.5 million visitors a year is quietly keeping the lights on too.
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Skip the railing, take the river trail
Most visitors snap a photo from the upper observation deck and leave. That’s a shame, because my vote for the better view is down at the bottom, where the mist actually reaches you.
The river trail drops 374 feet over 0.7 miles through a mossy rainforest of maples, Douglas-firs, and sword ferns. Going down is easy. Coming back up is the part your calves will remember, so pace yourself.
Down below, a riverside boardwalk and observation platform put you right in front of the falls. The trail ends at the 1910 powerhouse, which isn’t open to visitors, so enjoy it from the outside.
Autumn is a great time to go. Rain makes the falls spread from roughly 50 feet across to as much as 150, and the crowds thin out compared to summer weekends. Stay behind the railings and check Puget Sound Energy’s park page for current conditions before you head out.
A place that matters far beyond the view
The Snoqualmie Tribe considers the falls sacred. According to tribal tradition, this is where First Woman and First Man were created by Moon the Transformer, and the mist rising from the base connects Heaven and Earth. It’s worth carrying that with you as you stand there.
Make a day of it
The 12-acre park is open for day use year-round, with free parking for about 450 cars in the main lot and 41 spaces at the lower park. There’s also a hydroelectric museum on site, open Wednesday through Sunday during its season.
Want more water? Our full Snoqualmie Falls hike guide covers the trail in more detail. Nearby, Franklin Falls is a 2-mile out-and-back that needs a Northwest Forest Pass, and Twin Falls is a moderate 2.5-mile out-and-back that needs a Discover Pass. You’ll find even more in our roundup of waterfalls near Seattle.
Trip tips: grab a rental car to get out here, or lock in your hotel before the good rooms are gone.
So, be honest: did you know the biggest part of Snoqualmie Falls was underground? Tell us in the comments which Washington waterfall you think deserves more love.
Rules and fees change — always confirm current requirements before you go.
