A Massive Waterfall Four Times Larger Than Niagara Once Shaped Washington’s ‘Geological Wonder of North America’

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A Massive Waterfall Four Times Larger Than Niagara Once Shaped Washington's 'Geological Wonder of North America'

Washington has consistently earned strong consideration for the title of “most beautiful state in the country,” and it’s not hard to see why! The stunning Cascade Mountains (which includes “the crown of the Pacific Northwest,” aka the breathtaking, Alps-like Mountain Rainier) dominate much of Washington’s pristine landscapes, displaying prominent snow-capped peaks interspersed with heavenly meadows and forests. As if that wasn’t enough, Washington’s dream-like Pacific coastline boasts some of the most beautiful beaches in the world. 



However, while the Cascades and coastal rainforests get all of the attention, Washington’s Central and Eastern corridors tend to get overlooked. This would be a mistake, as Washington’s vast landscape east of the Cascades has plenty of amazing outdoor destinations as well. None of these destinations are more representative of the underrated beauty of this corner of the state than the fantastic Sun Lakes-Dry Falls State Park. 

Sun Lakes-Dry Falls justifiably earns the title of “geological wonder,” but being a three-and-a-half-hour drive from Seattle and almost two hours from Spokane, it’s a geological wonder much different from the titanic Cascade Mountains or the serene Washington coastline. In contrast to the deep, lush forests further west, Sun Lakes-Dry Falls is surrounded by a much more arid and sparse eco-region, featuring vast plains, grasslands, and shrubs. The ancient riverbeds and gorges that define the park’s remarkable scenery are just as breathtaking as Mount Rainier in every category but elevation; and depending on your tastes, Sun Lakes-Dry Falls’ geological heritage may be more impressive than even that of the volcanic Mountain Rainier. Unlike the geothermal activity that forged much of the Cascades, Sun Lakes-Dry Falls State Park owes its existence to a gargantuan ancient waterfall — four times the size of Niagara Falls!



Witness one of the nation’s unsung geological marvels

The Pacific Northwest is already no slouch when it comes to spectacular waterfalls. For example, Idaho’s majestic Shoshone Falls (aka the “Niagara of the West”) is an overlooked treasure trove of year-round beauty. As amazing as the region’s waterfalls are today, none hold a candle to the deluge that forged Sun Lakes-Dry Falls! 

Around 15,000 years ago, at the end of the last Ice Age, a massive ice dam in what is today Northern Idaho collapsed, unleashing as much as 600 cubic miles of water across the region and causing significant changes to the terrain of the Columbia Plateau. In Central Washington, these Ice Age floods forged a deep gorge and a gigantic waterfall that measures today at about 400 feet high and 3.5 miles wide —  when actively flowing, the waterfall was more than four times the size of the mighty Niagara!

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This once fearsome waterfall eventually subsided in the subsequent millennia, but its signature is still written all over the landscape of Sun Lakes-Dry Falls State Park. The site of the waterfall is now a prominent rocky cliff that easily conjures comparisons to the mighty Grand Canyon further south. Around the park’s central lake are sizable basalt cliffs and canyon walls, which create a distinctly otherworldly effect when combined with the vast open spaces and fertile oases of Washington’s High Desert region. The entire park and its notable geological features sit within a deep and ancient riverbed in Central Washington known as the Grand Coulee. The entire Grand Coulee region, including Sun Lakes-Dry Falls, offers an unforgettable scenic experience defined by breathtaking lava-forged cliffs, intricate waterways, and unique (yet amazing) views. 

Experience outdoor adventures in an underrated corner of Washington State

Dave Pennells

By Dave Pennells

Dave Pennells, MS, has contributed his expertise as a career consultant and training specialist across various fields for over 15 years. At City University of Seattle, he offers personal career counseling and conducts workshops focused on practical job search techniques, resume creation, and interview skills. With a Master of Science in Counseling, Pennells specializes in career consulting, conducting career assessments, guiding career transitions, and providing outplacement services. Her professional experience spans multiple sectors, including banking, retail, airlines, non-profit organizations, and the aerospace industry. Additionally, since 2001, he has been actively involved with the Career Development Association of Australia.