Greylock stands over Adams like a weather report you can read from the yard — clouds snagging on the summit while the valley below stays bright. AMS Lawn Services works that valley floor along the Hoosic, mowing, trimming and edging through a mountain summer that arrives late and leaves in a hurry. Grass grows fast here after a wet June week, and there is a rhythm to staying ahead of it. Cleanups bookend the season: winter grit raked out in April, maple leaves gathered in October when the hills go copper. What stays with you is the look of a mowed lawn on a clear Berkshire morning, striped and level against all that rising ground.