Can small boats travel beyond the Danube's commercial shipping reach?

Is the Danube navigable only within the reach used by large commercial vessels?

Small canal boats can travel farther upstream. The suggestion that they can reach near the river's beginning rests on a recollection of a friend's journey.

Navigability depends on the size of the vessel. Narrowboat-sized craft can travel farther upstream than large commercial transports. Alex Clarke recalls a friend taking a canal boat far upriver and tentatively places the journey near the river's beginning. That recollection is the basis for the suggested upstream extent.