The Berowra track in the Ku-ring-chase National park is a top easy paced walk that will take you on a great circuit along the water. This hike is also excellent if you don't have access to a car as you can start and finish the Berowra track from the Berowra train station to the Cowan Station. If you do drive however, we'd suggest starting the hike from the apple tree bay car park. Apple tree bay is nearby the national park information office and has a cafe, great for before or after the walk depending if you prefer morning or afternoon hike.
Cross over the bridge by the boat ramp at apple tree bay and you will spot the marked trail head. At the 800 meter mark there will be a turn off to your left, this is where you will be coming back down later, for now stick to the right, following the water. After another 4.2km of flat trail following the water you will reach the base of the assent. The climb up to Berowra station is 2km and may be a slow climb up. Hop onto the first train heading south to mount kuring-gai. From mount kuring-gai station you will find signs pointing you back to the track over to the east side of the train tracks.
You should come out onto hardwood avenue, follow this to the very end of the street which will take you to the signposted trail head. From here you will start the decent back down to apple tree bay for 2.4km. Along the decent you will come to a fork in the trail, go to your left. Once you reach the bottom you will come back onto your original trail in the spot I described earlier (800m into the hike). Turn right here to head back to the car park.
The Berowra track circuit is flat for the majority of the way as it follows the water, making it great for kids. The time for the Berowra track can also vary highly, a fit person could finish the whole circuit in 2-3 hours depending on pace and train times. Or it could also take 3-4.5 hours to complete the bushwalk.
If you do the walk in summer, pack a towel as there are plenty of spots that might entice you for a swim.