Ice-out on Lake Sunapee is the sound the town waits all winter to hear, and once the water is open the mowers start. Lake Sunapee Tree Service works the whole calendar — mowing, trimming and edging through the summer, a cleanup after mud season and another before the first hard freeze, then plowing, shoveling and sanding when the lake road glazes over. Shoreline places here run steep and narrow, and both jobs take some thought about where things end up. A cut lawn tipping down toward open water in July; a cleared drive above it in February. Same houses, opposite weather, equal satisfaction in getting it right.