Easy: Little or no physical challenge involved. This level of hiking includes 2-4 miles, usually covering terrain that moderately rises and falls with hikes on unpaved trails as well as paved or gravel surfaces.
Easy to Moderate: Some exertion required. Hiking with an elevation gain of up to 1,000 ft. including 4-6 miles, covering terrain that is rolling.
Moderate: Your heart rate will go up now and then. For a reasonably fit person. This level of hiking includes an elevation gain of up to 2,000 ft. with 6-8 miles, including terrain that is rolling with possibly a few steep sections.
Moderate to Strenuous: Be prepared for some serious huffing and puffing. You will need a pre-trip workout program. Hiking 8-10 miles on hilly climbs with a few steep sections including an elevation gain of 3,000 feet.
Strenuous: Even if you are in good shape, expect to be seriously challenged. A vigorous pre-trip aerobic workout program is mandatory. Hiking includes 10-15 miles on hilly, rugged terrain with several steep sections and an elevation gain of up to 4,000 feet.
Very Strenuous: If you haven't done a few strenuous trips, don't even consider this one. You'll need to be in top cardiovascular condition, have endlenss stamina, and be of robust health. Hiking 15+ miles on steep, rugged terrain with climbs of 4,000 feet or more.