There are two settings in There's A Hair in My Dirt! Each is detailed with many complex visual elements in the drawings, even though the drawings are done in a rough, amateurish style. The beginning and ending frames for the narrative take place in the worm family's underground home, which is "beneath the floor of a very old forest, nestled in among some nice, rich topsoil."

When Father Worm begins telling a story to his son, he sets that story "in a forest not too far from here."

The forest setting bears a distinct resemblance to the coastal forests near Tacoma, Washington, where Larson grew up, and Seattle, where he lives now. The trees shown are mostly conifers and some hardwoods of a size and age not commonly seen outside the Pacific Northwest. The smaller plants-ferns, ivy, mushrooms, and meadow flowers—are consistent with those that can...