The snowmelt comes first on the south-facing slopes, the lawns that catch afternoon light earliest, and the ground gives in that particular way — the top inch turning soft while everything below is still frozen. This is what they call mud season in New England, though they might as well call it the fifth season, because it is unlike any of the four named ones. It is not winter’s harshness nor spring’s renewal but something without a character except its own, which is dissolution.

The mud is not brown. People say brown but it is twenty things: clay red at the roadsides, blue-gray where the frost comes up, dark almost black where the roots reach down into last year’s leaves. It holds impressions. A dog’s paw, a boot heel, a bicycle tire — they all leave their signatures, and by the next morning they are cast in a light freeze, preserved until noon when everything softens again.

The gravel roads are the first to go. Selectmen of small towns post weight limits in early March — ROAD CLOSED TO HEAVY VEHICLES — and this is serious business, not bureaucratic theater; a loaded truck can sink into a frost-heaved road, get stuck, and tear up the surface when it finally pulls free. The road is soft for a reason: the frost is leaving the ground, pushing up, and the water has nowhere to go. The road is alive in a way it isn’t in July.

You learn to walk around the edges of things. Stay off the lawn — the ground is soft enough that each step will pull up a cone of roots and leave a hole. Step on the stones, the packed sections, the gravel where it’s deep. The woods are surprisingly passable because the leaf litter from five autumns acts as a mulch-insulation, and the canopy held some of the snow, and down in there it’s cold enough that the ground is firmer than the open field. You can walk in the woods in mud season. Not the field.

The smell is the thing that people born to it know in their bodies without naming. Decay and cold at once, a wet-earth smell with an animal quality, the smell of last year’s leaves becoming something else. Not unpleasant — the opposite, actually, the smell of something opening. Every year it comes as a small shock of recognition.

People get restless in ways they didn’t get restless in February. February had its own logic: cold, dark, endure. March breaks the logic. The light is back — the days stretched visibly, an extra hour since the solstice — and the body wants to go outside and work, but outside is not yet the outside it will be. The mud is a disappointment and a promise at once. You can’t plant anything. The cold comes back at night. But you can see where the tulips are going to come up, the little nubs just breaking the surface, and there is something almost violent about how much you want them.