Goofs

In the campfire scene where John Morris and Hermann Kermit Warm are eating, the camera pans between the two characters several times during their conversation, and in those brief moments, the spoon Hermann Kermit Warm is eating with switches 4 times from his left to right hand. At 23:20 he's eating with left hand. At 23:34 he's eating with right hand. At 23:54 he's eating with left hand. At 24:12 he's eating with right hand. At 24:24 he's eating with left hand.

The darker horse was clawed in the face by the bear, but later the roan horse with the white blaze has the bandage. The darker horse has none.

The gold-finder is pure nonsense.

Even if such a thing could exist, it would be easily demonstrated in a laboratory.

In the 1850s gold rush, Jacksonville Oregon was the county seat with a booming Chinatown. This was omitted from the film.

After Charlie Sisters visits the claims office in San Francisco, he tells Eli that the men they are looking for are at Folsom Lake on the American River. Folsom Lake didn't exist until Folsom Dam was built on the South Fork of the American River in 1955.

At several points throughout the film, starting from the first town scene, House Sparrows are heard calling in the background. However this species was not introduced to the US from Europe until 1852, and only then in New York.

The film shows pull-chain flush toilet in San Francisco in 1851. That toilet was not invented until 1860.

At 09:35 you can see one of the crews. She is visible at the bottom left of the screen.