Aurora keeps one long green thread running through it — the High Line Canal, easing along its slow grade with cottonwoods leaning over the path. Martin Mowing and Lawn Service LLC starts early on mornings like that, while the air still holds the cool the high plains give back overnight. Mowing, edging, trimming close along the walks, and cleanups when the season turns, with the leaves gathered up before the wind decides where they belong. Then winter comes down off the Front Range and the job changes shape: a driveway opened to bare concrete, a front walk you can cross in ordinary shoes. Same yards, same hands, half a year apart.