I was in Lander last week for two appointments and took advantage of the gorgeous weather to walk along the river. It is too early for the spring run-off, so the river was not very high, but the water was crystal-clear.
I'd estimate the water was about 14 - 20 inches deep in this area, but every stone on the river bed is visible. The water was extremely cold and icy in shady places.
Lander has some beautiful places to explore on foot.