Littleton's Main Street rides above the Ammonoosuc, and from the riverwalk bridge you can watch the water throw itself over the ledges all summer long. Track-Side Farm & Garden Center works the lawns of that town — mowing, trimming, and the seasonal upkeep that holds a yard even from the first cut in May to the last one in October. North Country grass grows in a hurry once it finally gets going, then quits all at once. Keeping ahead of it means steady visits, sharp blades, and clippings swept back off the sidewalk. A trim lawn on a Littleton hill street is worth the climb up to it.