As we walk, Dan Zigmond pulls on a black baseball cap. The sun is high, and the trees give little shade. It’s a big park—stretching across a good nine acres of grass, mulch, shrubs, and gravel paths—but from where we are, it looks much bigger. Beyond the nine acres, all we can see are more trees, more green, and the mountains in the east, so the park seems almost endless. “That always amazes me,” I…