WATCH: Surfers Ride 5 Mile Waves

In the Turnagain Arm of Alaska’s Cook Inlet, something called a tidal bore creates actual tidal waves “when the leading edge of an incoming tide pushes against an opposing current or the direction of a river.”

The result of this phenomena is giant surf-able waves. 

Check it out:

Apparently tidal bores are the next big thing in surfing.

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