| Y/M/D | Description | Place |
|---|---|---|
| 1869/00/00 | Desolation Canyon, | |
| 1869/05/00 | John Powell begins his expedition down the Green River and Colorado River | Expedition Island, Green River |
| 1869/08/04 | John Powell's first Expedition Down the Colorado River reaches the Paria River | Lee's Ferry and Lonely Dell Ranch, Marble Canyon |
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