Riegelsville hangs on the last steep miles of the Delaware in upper Bucks County, where a slender suspension bridge crosses to Jersey and the old canal towpath runs level beneath wooded hills that certainly do not. Fog sits in that valley most spring mornings until the sun clears the ridge, and A2M2 Landscaping & Design LLC starts the mowing route as it lifts — cutting, trimming and edging yards that are rarely flat and never square. Autumn buries everything up here, so leaf work runs for weeks under those hardwoods. Then winter comes down the river hard and the job becomes plowing, shoveling and salting on lanes that climb away from Route 611. A town this small notices when a driveway is open by six.