From the ridge in Washington Valley Park the hawks ride September updrafts south, and the whole valley lies open beneath them — Martinsville, the roofs of Bridgewater, the reservoir gone steel-colored. Amayas Landscaping 503 LLC works those streets down below as the season turns, mowing on a lengthening interval and starting in on the leaves. Mowing, string trimming, edging, and spring and fall cleanups run from the first green week to the last gold one. Autumn is quick here: one cold front spills over the ridge and the maples let go together. Staying ahead of that is the job, and a yard kept clear into November is the proof of it.