There is a wind that comes off Black Rock Mountain in late September, cool and sudden, and it tells the valley what's coming. Driver's Landscaping, LLC works the lawns below it in and around Clayton — mowing, trimming, edging, seasonal yard cleanups, and the routine upkeep that keeps a place from getting ahead of you. At elevation the growing season is short and generous at once: everything comes on hard in May and quits early, and the work is timed to that. What lasts is the shape of a yard held true through the whole run of it. A well-kept lawn under a mountain that big is a quiet kind of pride.