It helps to remember that Matsutake translates to "Big Pine Mushroom".I knew an old Japanese woman that was a very good Matsutake picker.
She picked near Crescent Lake OR
4000 - 5000 ft elevation
There are certain trees the Matsutake forms a symbiotic relationship with.
Mr. Google says...Douglas fir, Noble fir, Shasta red fir, Sugar pine, Ponderosa pine, or Lodgepole pine.
That narrows it down
They like to grow near Huckleberry bushes, too.