In 2005, after a long career directing and writing documentaries, Olivares decided to jump into fiction with the help of producer Jose Maria Morales (Wanda Films) with La Gran final (The Great Match), shot in Mongolia, the Sahara and Brazilian Amazon. This films won several international awards and was selected to participate, among others, in the Berlin International Film Festival. The film was an official selection at the Copenhagen International Film Festival, the Galway Film Fleadh, the World Cinema Festival, Cape Town and the Desert Nights Filmfest, Rome. It was nominated for Best Film at the Malaga Spanish Film Festival.
In 2006, he wrote and directed 14 kilometers, a film about the plight of African immigration that has won over 15 international awards, affirming him as one of the most committed filmmakers in the panorama of Spanish cinema. His 2010 feature film, Entrelobos (Among Wolves), based on the remarkable story of Marcos Rodríguez Pantoja, was one of the highest grossing Spanish films of 2010 with more than half a million viewers in theaters. It tells the true story of a young shepherd in a remote mountain area who befriends a pack of wolves and eventually becomes their leader.