I am researching the Sandoval family of Northern New Mexico. The family primarily lived in Colfax and Taos counties but did spend some time in Colorado. I have taken the family back to Santiago Sandoval who was born around 1815. He married Anna Marie Leiva and had one child that I know of Jose Miguel Sandoval in 1836 (Pensaco, NM).

You can find other information on the family from my website.
http://familytreemaker.genealogy.com/users/b/e/c/Richard-Becker-1/