The Washington Department of Natural Resources announced on April 11, 2013, that Omak had again been named a "tree city" because of their continuous efforts to "keep urban forests healthy and vibrant" for 15 years.
Das Washington Department of Natural Resources kündigte am 11. April 2013 an, dass Omak für 15 Jahre erneut den Titel Tree City für „die Erhaltung gesunder und dynamischer städtischer Wälder“ bekam.