Over Labor day weekend, I sat on the patio of the Apple Box Cafe in Petaluma and watched sailboats and small yachts motor up the river and park side by side like cars along the river bank. I’m guessing there was some type of social event going on because with temperatures in the mid 80’s, I’d have been heading the other way — towards the San Francisco Bay. But the situation was to my advantage because the boats provided excellent subjects to draw. Between the river and where I was sitting, a fenced off railroad track sign warned “No Trespassing.”