Although archaeologists frequently use the average stature range for Adena in Webb and Snow's Adena People No. 1, which is 5.51 feet for males 5.20 for females, the fact is that they based this ratio on studies of the bones of a mere 20 males and 6 females from Kentucky well enough preserved for measurement. Considering that the Adena Culture was also in Pennsylvania, Ohio, Indiana, and West Virginia in the Ohio Valley, as well as in New York State, Southern Ontario, New Brunswick, Tennessee, Alabama, and along the Mid to North Atlantic Coast, it is my opinion that this data may be skewed and not entirely reliable.
Of course, this does not mean at all that I am suggesting that all Adena people were the "Tall Ones", just that we probably don't have a well researched average" stature estimate. Most Adena were under 6 feet in height.