SPOKANE — When Craig and Vicki Leuthold opened the Maryhill Winery in 2001, there were about 100 wineries in the state of Washington.

That number has since exploded to more than 1,000 wineries that generate about $2.4 billion in revenue annually, and the remarkable growth is likely to continue.

Maryhill Winery, just south Goldendale in Klickitat County near the Oregon border, is part of that growth. It has recently opened tasting rooms in Spokane and Vancouver, Washington, and is in the process of opening a one in the Woodinville.

“Our timing was great,” said Craig Leuthold, whose winery produces 60 varieties. “Washington wine has really increased in popularity.”

With the second-highest number of wineries in the country, Washington has become a force in the wine industry. The leader, California, has about 3,700 wineries, which sell $40 billion worth of wine annually.

Within the U.S., wines from California are the top sellers, followed by wines from Australia and Italy. Washington ranks fourth in the sources of wine sold in the U.S., said Steve Warner, president of Washington State Wine, the industry’s trade group.

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“More Washington wine is sold in the United States than French wine,” he said.

Washington’s wines are consistently top-ranked, he said.

“Washington has a higher percentage of 90-rated wines than other top wine-producing regions in the world,” Warner said, referring to the 100-point scale for rating wines. “We are competing against wine regions with 28 generations of winemakers, who were doing it before America was a country.”

Most of the industry’s success stems from the state’s climate and soils, Warner said. Wine grapes thrive in long sunny days and cool nights, which the vineyards in the central and eastern part of the state enjoy.

The area also gets little rainfall compared with other grape-growing regions, which is a plus, he said.

Washington still has plenty of available land at reasonable prices in wine country, said Thomas Henick-Kling, director of the enology and viticulture program at Washington State University.

The acreage dedicated to grapes for wine is rapidly expanding. Twenty years ago, there were 24,000 acres of grapes. Today there are 59,000 acres of vineyards.

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Washington also has skilled farmers and winemakers, graduates of winemaking programs at numerous local colleges, Henick-Kling said.

Washington’s growth is no surprise, as the number of wineries and wine consumption continue to grow in the United States.

“The growth in wineries around the country is very exciting as wine sales continue to grow, particularly at the premium end,” said Gladys Horiuchi of the Wine Institute, which represents California wineries.

The 1,000th active winery license was issued to Jens Hansen, owner of Uva Furem winery in Maple Valley. Hansen retired from the Air Force, moved to the Seattle area and decided to become a winemaker.

“I feel like the Washington wine community is a lot like the Air Force, in that everyone looks out for each other,” Hansen said.

About 70 grape varieties are grown in Washington, with the most popular reds being cabernet sauvignon and merlot. Chardonnay and white riesling are the most common whites.

Most of Washington’s wineries are fairly small. The owners “are passionate about wine and work full-time and crush grapes on weekends,” Warner said.

There are a smaller number of mid-size wineries that enjoy national distribution, plus a handful of industry giants like Chateau Ste. Michelle, he said.

More investors from outside the state are joining the industry, Warner said. It also helps that Washington has long had a lot of wealthy people who work for companies like Boeing, Microsoft and Amazon and have money to invest in the industry, he said.

Many of the state’s best wineries are clustered around Walla Walla, which used to be known primarily for sweet onions and as home of the state penitentiary. Now it is home to world-class winemakers.

Warner expected the strong growth rate to continue.

“The line is not flattening,” he said. “I wouldn’t be surprised if we get to 2,000.”

One factor that could limit growth is climate change, but Washington also seems fortunate there.

The mighty Columbia River, which irrigates much of wine country, is predicted to be a stable water supply for many years to come, Henick-Smith said.

Heat spikes in the summer might damage grapes, he said. But farmers are moving vineyards to higher elevations looking for cooler ripening weather.

“Here in Washington we’re pretty stable,” Henick-Smith said.