Our Roots

From Ice Age floods to Native American heritage, there’s so much history here. Richland’s Manhattan Project changed the world, and today, the area is renowned for its award-winning wines and scientific breakthroughs.

Prehistoric Times

Millions of years ago, volcanic lava flows formed the Columbia Basin, home to giant animals like the Columbian Mammoth. You can still visit an active mammoth dig site in Kennewick.

Ice Age Floods

15,000 years ago, massive floods shaped the landscape, creating fertile soil perfect for agriculture. Rattlesnake Mountain, known as Lalíik, stood above the floodwaters and remains a historic landmark.

Native American Heritage

For over 10,000 years, Native American tribes have thrived at the confluence of the Columbia, Snake, and Yakima rivers. Discover the story of Kennewick Man, who lived here 9,000 years ago.

Lewis & Clark

In 1805, Lewis & Clark camped at the confluence of the Snake and Columbia Rivers, now Sacajawea Historical State Park. Follow their journey on the Sacagawea Heritage Trail.

The Manhattan Project

During WWII, the Hanford Site in Richland produced plutonium for the atomic bomb. Today, you can tour the historic B Reactor at the Manhattan Project National Historical Site.

Modern Innovation

The Tri-Cities is a hub for science and innovation. Home to the Pacific Northwest National Laboratory and the LIGO Observatory, the area continues to lead in groundbreaking research and technology.

Wine Country

Since 1972, the Tri-Cities has blossomed into a wine paradise with over 1,200 wineries. The Wine Science Center at WSU Tri-Cities is at the forefront of winemaking research.

Explore the Tri-Cities and uncover the stories that make this region truly remarkable!

Explore Tri-Cities

Cities & Neighborhoods Explore the communities that make up the Tri-Cities region, one of the fastest-growing areas of Washington… Learn More
Relocation Want to live somewhere that boasts abundant sunshine, a safe environment, and a vast amount of… Learn More
Weather Forecast As a semi-arid desert region, the Tri-Cities, Washington weather is hot and dry in summer with… Learn More
Maps The Tri-Cities is a playground of attractions and activities. Explore the maps below to find your… Learn More