Portions of the trail in this section are very narrow and the dropoff on the ocean side is severe. Use extreme caution, especially during wet weather. The trail crosses Kalalau Stream near the valley mouth before ending at Kalalau Beach and a small waterfall. Camping in Kalalau is allowed only behind this sand beach. During Summer, sea caves just beyond the waterfall provide popular camping shelters, but winter surf removes much of the beach and enters the caves.
Shaded campsites are available beneath the trees behind the beach.
Ocean swimming is not recommended for those unfamiliar with local sea conditions. Do not loiter beneath the waterfall or near cliff faces as there is a constant danger of falling rocks. An easy 2 mile trail into Kalalau Valley ends at a pool in the sream. This trail passes through extensive agricultural terraces where Hawaiians grew taro, the staple crop, until about 1920. These terraces are now overgrown with a variety of alien trees, including Java Plum, guava, and occasional large mango trees.