Okla. Stat. tit. 76, § 11
Except as specifically recognized by or provided in Section 5 of this act, an owner of land which is used primarily for farming or ranching activities owes no duty of care to keep the premises safe for entry or use by others for recreational purposes, or to give any warning of a dangerous condition, use, structure, or activity on such premises to persons entering for such purposes.
Laws 1965, HB 679, c. 384, § 2, emerg. eff. June 30, 1965.