Released in 1960, is a live-action Disney movie that dramatizes the 1869 expedition of Major John Wesley Powell, the first to map the Grand Canyon by traveling down the Colorado River. Despite its historic subject matter, the film is widely considered one of the weakest entries in the Disney live-action catalog. Movie Overview Director: William Beaudine.

John Beal as Major Powell, Brian Keith as Bill Dunn, and James Drury as Walter Powell.

While it serves as a "glorified orientation film" for the Grand Canyon, is largely remembered as a flawed effort that fails to capture the true peril of Powell's journey.

Critics and audiences from platforms like IMDb and Rotten Tomatoes generally agree on the following points:

Reviewers from Letterboxd note that while the location footage of the Grand Canyon is beautiful, it is often undermined by unconvincing blue-screen shots and rear-projection techniques.

Many viewers felt the film focused too much on geography and mapmaking at the expense of character depth. The conflicts between the men often feel perfunctory or resolved too quickly.