8 Things Eastern Washingtonians Want the West Side to Know

Mention Washington, and a lot of people picture rain, ferries, and Seattle traffic.

Eastern Washingtonians know their side of the mountains looks very different, and they’d like the rest of the state to know it too.

Here’s what they wish people on the west side understood.

1. Cascade Rain Shadow

The Western Regional Climate Center says the Cascade Range forms a barrier to moist air moving east.

The Washington State Wine Commission says the Columbia Valley, on the eastern side, lies in the rain shadow of the Cascades, the dry ground sheltered by the mountains.

Cle Elum gets 22 inches a year, less than a quarter of the 92 inches at Stampede Pass.

If you head east from the pass, that’s 70 fewer inches a year.

Near where the Snake and Columbia Rivers meet, annual precipitation is just seven to nine inches.

Near the Cascade summit, it runs 75 to 90 inches.

Along Washington’s eastern border, it runs 15 to 30.

If you’re used to the summit’s totals, the eastern border’s are a fraction of them.

2. Apple Orchards

Yakima County leads the nation in apple production, Washington State University Extension says, with more than 55,000 acres of apple orchards.

That’s about 86 square miles.

The Department of Natural Resources lists Yakima County in its Southeast Region, which it says spans central and southeastern Washington, from the Cascade foothills east.

Washington State University’s Cosmic Crisp apple was introduced in 2019.

Licensing revenue from the variety has topped $30 million.

If you’ve bitten into a Cosmic Crisp, you’ve tasted a variety developed at Washington State University.

3. Hop Yards

If you hike or ski in the Cascades, you’re in the range whose snowpack, Hop Growers of America says, serves Yakima’s hop yards.

The high desert of Yakima is home to over 70% of U.S. hop acreage.

Washington State University Extension adds that Yakima County leads the nation in hop production, with nearly 19,000 acres planted and harvested annually.

Washington, Idaho and Oregon together grow over 98% of the U.S. hop crop.

4. Grand Coulee Dam

The National Park Service says Grand Coulee Dam was completed in 1942.

That makes the dam more than 80 years old.

It stands 550 feet high and 5,223 feet long on the Columbia River, west of Spokane.

If you’re picturing the length, 5,223 feet is just shy of a mile.

The service calls it the largest hydropower producer in the United States.

Its output is 21 billion kilowatt hours a year.

If you’re ranking U.S. power plants by generating capacity, the Energy Information Administration puts Grand Coulee first.

5. Columbia Valley Wine

The Washington State Wine Commission says over 99% of Washington’s vineyard acreage is planted in the Columbia Valley.

The region lies wholly east of the Cascade Mountains.

It covers 11 million acres and crosses into Oregon, so not all of it is in Washington.

That’s about 17,000 square miles.

The region has an arid and semi-arid, continental climate.

If you live on the West Side, that figure puts nearly all of the state’s vineyard acreage on the other side of the Cascades from you.

If you tour a Columbia Valley vineyard, you’re visiting land that’s arid and semi-arid.

6. Dry Falls

Washington State Parks says Dry Falls was once a waterfall 400 feet high and 3.5 miles wide.

Compared with Niagara Falls, it’s five times the width and over twice the height.

You can picture the width as five Niagara Falls in a row.

An ice dam failure at glacial Lake Missoula in western Montana released the ice age floods that shaped the landscape.

Floods moved at highway speeds.

If you visit, you’ll be in the Columbia Basin, between Soap Lake and Coulee City.

The International Union of Geological Sciences selected Dry Falls as one of its first 100 international geological heritage sites.

7. Temperature Extremes

Hanford is in southeastern Washington.

That’s where the Washington State Climate Office lists the state’s hottest recorded temperature: 120°F, on June 29, 2021.

The lowest recorded is minus 48°F, at Mazama and Winthrop.

The Department of Fish and Wildlife places a wildlife area unit about 5.5 miles east of Winthrop, in Okanogan County.

Another sits about 1 mile north of Mazama, also in Okanogan County.

The Department of Natural Resources lists Okanogan County in its Northeast Region.

That’s a 168-degree gap.

If you live on the West Side, Hanford is on the far side of the Cascades from you.

You can check both records yourself on the office’s state records page.

8. Population Growth

The Office of Financial Management’s April 2026 estimates put Franklin County’s growth at 2.6%, Adams County’s at 2.1% and Benton County’s at 1.6%.

Those were the state’s three fastest rates.

All three counties sit in the Southeast Region.