Wyo. Stat. § 36-7-505
At any time within nine (9) months after the foreclosure sale by the sheriff, of the land and water rights as aforesaid, the original owner against whom the lien has been foreclosed, may apply to the person, company of persons, association or incorporated company purchasing at such sale, to redeem such land and water rights, and the purchaser shall assign the certificate of sale of such land and water rights to such original owner, upon the payment by him within such nine (9) months, of the amount of the lien for which the same was sold at such foreclosure sale, together with the interest, costs and fixed charges thereon. Where the lienholder becomes the purchaser at such foreclosure sale, if such lands and water rights are not redeemed by the original owner within nine (9) months, then at any time within three (3) months after the expiration of such nine (9) months, any person desiring to settle upon and use such land and water rights, may apply to the purchaser at such foreclosure sale to redeem such land and water rights, and such purchaser shall assign the certificate of sale of such land and water rights to the person desiring to redeem the same, upon the payment by him, within such three (3) months, of the amount of the lien for which the same was sold at such foreclosure sale, together with the interest, costs and fixed charges thereon.
W.S. 36-7-505