Out past Dolan Springs the Joshua trees start, thousands of them marching north along Pierce Ferry Road toward the canyon rim. Jon-Sons Pool Cleaning takes care of yards in that stretch of Mohave County — mowing, edging, trimming around walls and posts, and clearing the drifted debris that collects on the lee side of everything. The high desert here runs on extremes: hard sun by two o'clock, then a cold that arrives the minute the sun drops behind the Cerbats. Working with that means starting early, finishing clean, and leaving ground that looks tended rather than merely cut. A trimmed yard set against that Joshua tree horizon is a good-looking thing.