When Julie leaves for the mountain in the middle of a very bad rain storm to search for the gold in the stream, the outside shots show a very dark and rainy day. Immediately afterward, when her mother and father argue about her mother letting her go, her father angrily says, "You let her go out in this?" and gestures through the window outside, but it is clearly dry and sunny outside as seen through the window and the glass portion of the door.
When Julie is first getting ready to go out she is seen putting on black vans shoes. then after she climbs out the window with the vans on she is seen walking to the woods with sandals on. the next time we see her she is crossing a creek and she has the vans on again.
The Tribes of Grande Ronde Oregon are not from Central Oregon but from the central Coast Range Mountains of Oregon.