Riding the bore
 

A tidal bore (or simply bore in context, or also aegir, eagre, or eygre) is a tidal phenomenon in which the leading edge of the incoming tide forms a wave (or waves) of water that travels up a river or narrow bay against the direction of the river or bay's current.

Bores occur in relatively few locations worldwide, usually in areas with a large tidal range (typically more than 6 metres (20 ft) between high and low water) and where incoming tides are funneled into a shallow, narrowing river or lake via a broad bay.[1] The funnel-like shape not only increases the tidal range, but it can also decrease the duration of the flood tide, down to a point where the flood appears as a sudden increase in the water level. A tidal bore takes place during the flood tide and never during the ebb tide.

River Severn below


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And for a slightly different experience, White Water rafting on the Tidal Bore on the Shubenacadie River on the Bay of Fundy.

Shubenacadie Tidal Bore Rafting 2009 My Best Action Footage (short version) - YouTube

Smiles
Les

2 SUP's and a yak in the lineup...every shortboarders dream. ;)