Expand your horizons on trails less travelled within Onkaparinga NP. This is a challenging walk of some 14-15km loop with descents to the river and accents up the gorge. Initially walking down to the river, the walk then climbs the gorge to pick up a section of the Willunga Basin Trail, tracing edges of the park it then traverses less familiar tracks further up river. Testing your durability will be 3 water crossings: walkers should be prepared with spare socks and hand towel depending on river levels.