Colorado History-10pts?

Question

Determine the date(or approx date) when Indian-European interaction began in colorado.

Answer 1

In 1706 Juan de Ulibarri claimed Colorado for Spain.

Another item on the internet says:First visited by Spanish explorers in the 1500s, the territory was claimed for Spain by Juan de Ulibarri in 1706.

Answer 2

http://en.wikipedia.org/wiki/History_of_Colorado
click the link it is a really good source to answer the questions you want. http://en.wikipedia.org/wiki/Territorial_evolution_of_Colorado has the dates you want