Abstract The use of a written nature prescription (Park Rx) written by a child's primary care provider (PCP), physician, or nurse practitioner, is one hypothesized approach to encouraging children to participate in free, unstructured play in nature. PCPs recruited through the local chapter of the American Academy of Pediatrics were provided Park Rxs to write for children aged 6–10 attending a well-child visit. The written prescription was a tool for the PCP to use to start a conversation on the value of nature for physical and mental health. In addition, the Park Rx could be redeemed as a free day pass to any state park. The prescribing and redemption patterns for the Park Rxs were studied over the 15-week summer season in a rural state in the Northeast. The nature relatedness (NR) of PCPs and their likelihood to prescribe nature with a Park Rx prior to, during, and after the project were also examined. Eleven PCP offices in six counties participated in the pilot study and wrote a combined 1,935 park pres...