By late August the light along Route 145 goes gold early, and the old hamlet of Oak Hill sits in it like something remembered. Green Guy Lawn Services keeps the grass in that stretch of Durham going through the hottest weeks, mowing on a steady rotation, trimming out fence lines, feeding a lawn that has gone tired and tan. Up here the soil is thin over shale and rain arrives fast off the high ground, so the work is as much about timing as it is about machinery. The payoff is a yard still holding its green in the third week of drought and a driveway apron with no ragged fringe on it. Come autumn the leaves are gathered before they mat down, and the place is put to bed clean.