Well into July, Mount Sopris still carries snow in its high gullies while the valley below runs green and thirsty under a sun that feels a mile closer than it is. High Mountain Gardeners, Inc. works in that thin bright air, mowing lawns at heights that shade their own roots and trimming the edges where turf gives way to stone and path. Carbondale's altitude makes a short, intense growing stretch — grass that surges after a rain and sulks in a dry week — so the visits stay regular and the eye stays on the whole yard. Cleanups bracket the season at both ends, spring's matted litter and autumn's fallen leaves. The reward is a lawn that keeps its color right up to the first hard frost.