At the Lees Ferry launch ramp, where you to step ashore on river left (across the river from the put-in ramp), you are on Navajo Nation tribal land. The National Park Service at Grand Canyon National Park owns and is responsible to manage the river surface. Step out of the water onto dry shore and you have changed jurisdictional boundaries.
This is the case all the way to the Little Colorado River confluence with the main stem of the Colorado River. Downstream of that point, Grand Canyon National Park is is responsible to manage the river surface and the land on river left.
This is the case all the way to River Mile 165.1 Left (just downriver from Tuckup Canyon). Downstream of that point, you are on Hualapai Nation tribal land. The National Park Service at Grand Canyon National Park owns and is responsible to manage the river surface. Step out of the water onto dry shore and you have changed jurisdictional boundaries.
This is the case all the way to River Mile 273.9 Left. Downstream of that point, Grand Canyon National Park is is responsible to manage the river surface and the land on river left all the way to River Mile 277.5 where you exit Grand Canyon National Park and enter Lake Mead National Recreation Area.
2021.07.28 National Park Jurisdiction Along the Hualapai Reservation
2018.12.24 History and Policy for the Left Bank
For additional information, see Jeff Ingram's Blog GCFutures Celebrating The Grand Canyon which goes through the Park's boundaries in complete detail.
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