Colorado law allows non-parents to seek an allocation of parental responsibilities in limited situations. One route is available to a non-parent who has had physical care of a child for 182 days and files within 182 days after that care ends. Courts consider the child’s best interests and give special weight to a fit parent’s decisions while evaluating non-parent claims. Colorado cases discuss psychological parenting in this context and recognize when a non-parent relationship has become parent-like. The Supreme Court has also addressed non-parent standing under the statute. These authorities explain when a grandparent or caregiver can file and what they must show.