Hundreds braved temperatures that hovered around 20 on Tuesday morning for the annual Great Polar Bear Plunge at Lucky Peak’s Spring Shores Marina.

The event is a fundraiser for the Make-A-Wish Foundation of Idaho, which will use the money to grant wishes to children battling life-threatening medical conditions.

Besides taking a quick dip in the icy waters at 11 a.m., some participants chose to water-ski.

Bonfires on the shore helped the swimmers warm up after their dips in the frigid water.