Glen Gardner is tucked into a narrow Hunterdon hollow where Spruce Run Creek comes down cold and fast off the shoulder of Musconetcong Mountain. Cold Spring Lawn & Landscape LLC works the borough's steep side streets in both directions of the year. Winter means plowing and salting on grades that do not forgive a late start, walks shoveled to the stone, ice broken loose at the foot of the drive. Summer means mowing on hillsides, trimming along old fence line and foundation, mulch, and the cleanups that clear the hollow's heavy leaf fall. It is good work in a town this vertical, where every finished job is visible from the road above it.