When it comes to truffles, only Oregon matters.

This year, Oregon became the only place in the world to sell both homegrown versions of Old World truffles alongside its own native truffle, when farmer Pat Long sold his first crop of cultivated French black truffles, which he'd planted on his nearby hazelnut trees.

"It's unique on the planet," says mycologist and Oregon Truffle Festival organizer Charles Lefevre. "There is no other place where there are both native species and cultivated European species."

Like the French truffles, Oregon's native truffles are so prized by chefs and chocolatiers alike they can fetch up to $800 a pound. This month is the apex of the season, with both black and white truffles in abundance.

Oregon and the surrounding Pacific Northwest are the only places truffles grow in America—and account for up to one-third of the truffles we eat nationwide, even when you factor in French and Italian imports. While you aren't likely to find them inside Portland, forests throughout the Willamette Valley and Columbia Gorge are thick with the valuable mushrooms growing on tree roots—anywhere Douglas firs are found.

And the crop is poised to grow.

Lefevre, an advocate for the local truffle, conducted a feasibility study in 2009 showing that the high-dollar truffle industry could one day be as big as the local wine industry. It's already worth between $1 million and $5 million, depending on how you measure it.

"There effectively isn't a truffle-harvesting industry anywhere else in the United States," Lefevre says. "Oregon owns the brand. Oregon truffles do live in Washington and California, but they are called Oregon white truffles. The Latin name is Tuber oregonense."

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