The famous upper Buffalo River bluffs are spring-only — summer is too shallow to float
The postcard Ponca-to-Pruitt stretch of the Buffalo National River is, per NPS, only navigable by boat in the spring and early summer when consistent rainfall feeds the watershed. The Buffalo is undammed, so the upper river drops fast and is usually too shallow to canoe by mid-June; the middle and lower districts hold water longer. Check the live gauges at ar.water.usgs.gov/buffaloriver before you commit a rig and a float to the same trip.
Source: NPS — Buffalo National River, Upper District Paddling



