The Kalalau Trail is 11 miles (18 km) long and involves a lot of strenuous uphill hiking and is only recommended for fit and active hikers. The trail requires obtaining special permission for $20 a day. The trail at its quickest will take a day to complete, at the end of which you reach a secluded and pristine beach. Those who are more adventurous can choose to further swim around the corner for an even more private camping experience. Along the hike, one can experience beautiful vistas, waterfalls, and beaches. At the most strenuous part of the hike, it covers 800 feet from sea level in 1.25 miles. There are three different stream crossings, so please be sure to check the sea level and current before attempting and make sure to go in a group or at least with one other person. As deadly as it may seem, it is considered as one of the most rewarding hikes and is a must do if you are a fan of the outdoors.