PORTLAND (AP) — Mainers are jumping into the frigid ocean to raise money to support the state’s largest environmental advocacy group’s fight against climate change.

The Natural Resources Council of Maine is holding a 5-kilometer race on Tuesday at 11 a.m., followed by a cold-water ocean plunge at Portland’s East End Beach at noon.

The group says about 200 Mainers are expected to attend. It is encouraging participants to wear polar bear costumes and will be handing out prizes for the best ones.

The annual fundraiser supports the group’s efforts to fight climate change.