Wyo. Stat. § 23-2-209: Wyoming sport fishing day; fishing exempt from licensure.

The commission may annually designate not more than one (1) day each calendar year as a free sport fishing day. Residents and nonresidents may during the designated free sport fishing day, without payment of any fee and without acquiring a license pursuant to W.S. 23-2-201 or a conservation stamp under W.S. 23-2-306, exercise the privileges of sport fishing licensees subject to limitations imposed upon licensees by law and commission rule and regulation.