The Turnagain bore tide. Is basically a wave formed when a super low tide and a super high tide crash into each other in the Narrow and shallow Turnagain Arm. 

The area has some of the biggest tide differences in the world. The #1 place being Hudson Bay In Canada. The one wave can come twice a day and is local surfers and paddle boarders love to ride it. Sometimes riding for 5, 10+ on faces up to 10 feet high.