You need to be able to hike for a full day, carrying a daypack and walking in water, depending on the Oahu hiking tour you select. Each day trip, you’ll hike between three and eight hours. The terrain can be muddy and challenging and the weather unpredictable. On occasion you will have to scramble and tackle rope sections.That said, if you are looking for adventure and up to the task of full-day trekking, you’ll be rewarded immensely!