Eric Jacobson's workshop, which continues to tomorrow at Winslow Art Center. His style is somewhat similar to Tim Deibler's, even a little less detailed.
But their brush strokes and mark making are not far a part, which I want to get to but almost impossible to accomplish so far.
I tried Palouse Falls from the photo I took from my winter vacation. I could only managed get the drawing and values into acceptable range but not much different from what I've been doing en plein air. I'll try something better tomorrow.