This popular three-hour 15-minute (5.7 km), moderately challenging bushwalk in the upper valleys of Lane Cove National Park showcases a rich variety of birdlife and wildflowers. Along the iconic sandstone ridges, many small birds such as honeyeaters, wattlebirds, and wrens may be seen, and native flowers abound. In the Devlins Creek and Byles Creek valleys we may be lucky enough to observe the resident powerful owl. And who will be the first to spot the whale?