Wyo. Stat. § 36-2-207
The party appealing shall, within thirty (30) days after receiving notice by registered mail of the decision of the board, file with the director, a notice in writing to the board of land commissioners stating that such party intends to appeal to said district court from said decision; and at the same time shall file a like notice in the said district court; and upon the filing of said notices, the appeal shall be deemed to have been taken; provided, however, that the party appealing shall within fifteen (15) days after the said notices have been filed, enter into an undertaking to be approved by the clerk or the judge of the said district court and to be given to the appellees, and to be in such an amount as said court or the judge thereof shall fix, but in any case, shall not be less than five hundred dollars ($500.00), and conditioned that the appellant shall prosecute his appeal without unnecessary delay and will pay all costs and damages which the appellees or any of them may sustain in consequence of such appeal.
W.S. 36-2-207