The other I saw a show on history channel about "giant skeletons" being found in North America, it is also said that by some reason these findings have been hide from people, maybe do to they being hoaxes or something else.
According to this page they have found 12ft (3.65m) skeletons, a lot of these skeletons have been found in Nevada, there is another documented case in Texas .
Other sources state that there´s been finding with several bodies together:
A mound near Toledo, Ohio, held 20 skeletons, seated and facing east
with jaws and teeth "twice as large as those of present day people,"
and besides each was a large bowl with "curiously wrought hieroglyphic
figures." (Chicago Record, Oct. 24, 1895; cited by Ron G. Dobbins,
NEARA Journal, v13, fall 1978)
and
In 1895 in Toledo, Ohio 20 giant skeletons were found seated with jaws
and teeth twice as large as a normal skeleton’s. Yet another giant
skeleton was unearthed in 1928 by a farmer in Louisiana. This skeleton
was 9 feet 11 inches. Many claims have been made about these abnormal
skeletons, the majority of people claiming they belong to the
mysterious Sasquatch.
Finally this site says that real encounters where logged by Magellan
Although there seems to be a lot of information out there, unfortunately none of the sites that I found has references so I'm not sure how reliable the information is, so was there a giant red-haired race in North America?