Black Lava Rock - Seattle Area?

Question:Does anyone know where to find bulk BLACK lava rock in the Seattle area? Just like the red lava rock (1"-2") in size that is seen everywhere. I found a place in Spokane, just hoping for something a little closer.

Answers:
Exit I-5 at Woodland to go east on 503 past Cougar to
follow Trout Lake signage signage. Using topo' or Gifford Pinchot National Forest maps locate burrow works in the vicinity between Mann Butte and Steamboat Mountain. Do
a short bed recon first, with a couple jerrycans of fuel, extra tire, and six gallons of potable water to verify road condition.
Take a gasoline 36 inch chain saw, shovel, and axe/mattock.
Use GPS between Cougar and Trout Lake. Both towns do
have ample supply services. National Forest camping has no
fee but fire is not permitted. Suggest .44 magnum revolver.
Some excavations are clearly inactive but have standing heaps of abandoned stone in size grades. Personally recall
black lava in three seperate truck entry prospect sites . . .
(yet another had bright red sand superb for child playground).