1923 expedition
By National Geospatial Program
1923 (approx.)
![1923 expedition](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/1923%20expedition.jpg?itok=asaylwdn)
Detailed Description
The full 251-mile length of the Colorado River that was surveyed by the 1923 expedition is highlighted in yellow. It is all within the present-day boundaries of Grand Canyon National Park (Westwood, 1992).
Sources/Usage
Public Domain.