Level 1:  Beginner – The easiest type of hike you can get with no real inclines. Stroll in the park.
Level 2:  Beginner – Next level with some simple inclines.
Level 3:  Beginner – Hikes with some basic experience, experience gain.
Level 4:  Moderate – Good inclines with some stress on further distance.
Level 5:  Moderate – Inclines start to get more intense. Gain and distance goes up.
Level 6:  Moderate – Simple switchbacks and distance increase. Endurance required.
Level 7:  Moderate – Expect some long inclines or switchbacks. Gain and distance increases.
Level 8:  Advanced – Intro to Advanced here. Distance hikes and more than moderate experience required.
Level 9:  Advanced – Long distance hikes which may take more than 6 hours with great gain.
Level 10:  Advanced – Longest hikes and/or greatest gain/inclines through out the hike. May last all day.