[3] The river is notable for passing underground through a sinkhole in Sinks Canyon State Park, only to emerge several hundred yards downstream at "the rise."

The ground distance is not far, but tests with dye have shown it takes the water many hours to flow through the underground passage.

The expedition's report describes geology along the river with detailed documentation of everything from Native American petroglyphs to early white settlements.

[12] In April 2019, the Wyoming Department of Environmental Quality filed a notice of violation with Maverik Inc due to a gasoline leak on the river.

[13] The department conducted tests and reviewed documents after it received reports of gasoline leaking into the river near a Maverick gas station on Main Street in Lander.