Colorado allows for a second-parent to adoption under C.R.S. § 19-5-203 if the child has a sole legal parent and the sole legal parent wishes the child to be adopted by a specified second adult. Our firm has a web page which explains the process in greater detail. Here is the link: /colorado/family-law/adoption/must-knows-colorado-adoption/. Please feel free to call (303)688-0944 to set a free appointment to discuss this with an attorney.