Listen here: The Nancy Karl loop sits at the top of the Friendly Hills in Joshua Tree - a quiet neighborhood that backs up the northern border of the National Park. The trailhead is tucked near the end of Sunny Vista Road. There are homes and fences right on the trailhead, but it only takes a few minutes of walking on the soft granite path to feel like you are in the national park, with lichen covered boulders appearing as you gently gain about 300ft in elevation on the 2.3 mile loop. The loop…