This tidal bore on the Kampar River in Sumatra might pose one of the biggest logistical challenges to get to and surf (it’s almost impossible to surf the Bono without a boat as back-up) but the shortest rides stand at between 10-15 minutes, it will hands down deliver the longest surf ride of the lot. The record time for a single wave there at present stands at just over an hour (see below), but the waves are known to travel up river for up to 4 so who knows what’s the limit! The bigger the tides, the bigger and longer the waves, and this tidal bore is so consistent it actually breaks daily. Time it right when the waves are most powerful, like Tom Curren, and yes you could even get barreled.

Also: Steve King, borerider extraordinaire, comments below: “I rode the Bono a few years back with some friends from the UK for just under 13 miles which took 1 hour and six minutes which is the current record on the Bono. We also rode the Severn here for an hour and seventeen minutes which clocked up over 9 miles. As for number of turns I give up counting after 150.”