From the North Lake Beach parking area in the Catskill Forest Preserve, a narrow foot trail climbs a rocky incline. After following the trail for about 20 minutes, hikers reach Artists Rock, which gives a sweeping view of the Hudson Valley, the river a sliver of silver in the distance. The trail then leaves the ledge and in less than a half mile it meets a junction with a side trail toward Sunset Rock, the prized view from atop North Mountain that by the late 19th century had become an iconic view of the northern Catskills, celebrated in the work...