The pilot of the tailwheel equipped airplane reported that, while landing off-airport on a gravel river bar, the airplane veered right, hit a rut and bounced. The pilot applied the brakes and the airplane subsequently nosed over coming to rest inverted.
The airplane sustained substantial damage to the right-wing lift struts and empennage.
The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.