Difficult and challenging hiking on or off trail and in steep terrain. Up to 2 consecutive nights primitive camping in remote areas with no toilet facilities. Other nights in an inn or campground. Fast paced, long days of physical activity.
Level 4 trips require a fairly high level of fitness. You should, at a minimum, be able to walk or run 5 miles without taking a break and be prepared to endure a fair amount of adverse weather without whining. At a minimum, you should expect wet feet. At times you may be completely wet and possibly cold.