This tour is certainly one of the most beautiful hikes on Kauai. I have walked it several times. You should inform yourself about the conditions in the Kokee Museum, which is located opposite the Kokee Lodge. This hike is not feasible after heavy rains because parts of the trail even slide off sometimes. Especially on the "Nualolo Cliff Trail" part that branches off at the "Nualolo Trail". Whether you want to go for the combination with the "Awaawapuhi Trail", is up to your assessment of physical fitness. With 17 km and 850 meters of altitude (about 6 hours), and partly very narrow paths, the complete trail is no walk in the park and almost only manageable if you have rented a cabin at Kokee Lodge and don't have to drive back to Waimea or the valley afterwards. In addition to that, you should not be scared of heights. If you "only" want to hike the big highlight of the tour and have a look into the rugged Nualolo Valley, the shorter "Nualolo Trail" (11 km, 550 vertical meters) is recommended. However, it leads back the same way as the outward route. As with all hikes, an early start makes the hike less strenuous in the sun and high humidity.