The Silver Dragon is the largest tidal river bore in the world. Formed at the mouth of China’s Qiantang River 30 miles past the city of Hangzhou, the tremendous narrowing of the river and the rising of the riverbed constricts the water and creates a mammoth wave running as high as 30 feet and traveling at 25 mph. The Silver Dragon makes its appearance twice a year.

Charles Lanceplaine shot this footage this year of surfers Jamie Sterling, Mikala Jones, Robert Weaver and Mary Osborne riding the Silver Dragon.