This is a substantial film with considerable weight behind it. Howard Hawks directed this one, featuring John Wayne and Robert Mitchum, so El Dorado certainly has impressive credentials. Fortunately, the anticipation surrounding such a pairing isn’t misplaced. The storyline is familiar territory for those acquainted with Wayne and Hawks' work; if you enjoyed Rio Bravo, there’s a good chance you’ll appreciate this as well. Wayne portrays Cole Thornton, a hired gun recruited by El Dorado landowner Bart Jason (Ed Asner), who’s embroiled in a land dispute with the MacDonald family. Cole discovers that his old friend J.P. Harrah (Mitchum) is serving as sheriff and receives a warning from him: involvement with Jason will trigger law enforcement action. Events unfold where Cole finds himself opposing Jason and his men. Then, the sheriff, an experienced Indian fighter named Bull Harris (Arthur Hunnicutt), and a young gambler, Alan Bourdillion 'Mississippi' Traherne (James Caan), who’s skilled with a knife, join forces to challenge Jason’s authority. Adapted from Harry Brown's novel The Stars in Their Courses, this was one of Howard Hawks’ last films. Released in the late 1960s, it seems somewhat overlooked in his filmography, likely due to Rio Bravo’s popularity—of which this is essentially a remake. However, quietly put, El Dorado might be the stronger film regarding performances and how Hawks explores certain themes. Given that Wayne and Mitchum were friends outside of acting, their on-screen chemistry is excellent. They play off each other's masculinity to create a tough yet entertaining movie. The final product skillfully addresses various ideas: loyalty, unity, forgiveness, respect, and professionalism. Caan and Hunnicutt also contribute significantly, portraying different generations within the classic Western setting, with aging being a notable element highlighted by the experienced director. El Dorado feels like a project where everyone involved is comfortable with what they're creating; nothing seems forced or bogged down by unnecessary additions. It prioritizes dialogue over flashy action sequences, although the action that does occur is handled skillfully by the veterans and the energetic Caan with his sawed-off shotgun. This is a story without tricks, one that isn’t just meandering along to set up a final shootout. There's value in traditional storytelling, and we get it here. It’s intelligent, sincere, and surprisingly funny; El Dorado is an excellent film that continues to hold up well through the years. 8/10

Source on TMDB