Under C.R.S. 19-1-117, a grandparent can petition a Colorado family law court for reasonable grandchild visitation rights in the following situations:

1. The grandchild's parents have obtained a dissolution, annulment, or legal separation,
2. The child has been placed into the legal custody of someone other than a parent, or
3. The child's parent, who is the child of the grandparent seeking visitation, has died.

There is no automatic right to grandparent visitation - the Colorado family law court must find that it is in the best interests of the child to have grandparent visitation. And, once granted, Colorado grandparent visitation may be modified or terminated if it is in the best interests of the child.

Finally, Colorado grandparent rights and visitation are terminated by the child's adoption, or termination of the parental rights of the child's parent who is the child of the grandparent.

Therefore, as the child has been adopted by the once fosterparent - you have no rights as to custody and/or visitation.

Sorry.

You can file a petition - but the petiton will denied immediately because pursuant to statute you have no rights.

Sorry.