Midday in July, on the grid of streets between Hampden and Oxford, heat comes up off the asphalt in a shimmer and the only shade is whatever the old elms have managed to hold. South Denver Lawn Service works straight through it, one lot to the next — mowing, trimming around posts and play sets, edging the walks, blowing the drive clean before the trailer gate closes. A route has its own rhythm, and the reward at the end of a hot afternoon is a street where every yard on the list looks finished. Sheridan is a small city built of small yards, and small yards repay attention quickly. Week after week, that attention is the entire service.