Sunrise over Ridgeline Open Space arrives in one long slide from the east, gilding the hogbacks and then dropping into the neighborhoods below — and by then the first mower of the day is already running. Ridge Rock Landscaping keeps to that early hour, while the air up here is still cool enough to make the work a pleasure. The list is honest and short: mowing, crisp edges along drives and walks, trimming what a mower cannot reach, cleanups in spring and again when the leaves let go. A cut lawn with a hard edge is a small kind of order, and it holds all week. Castle Rock, reaching out toward Castle Pines, Parker and Franktown.