The Sydney University Bushwalkers have released a nude calendar with all proceeds donated to the Give a Dam foundation.

The Colong Foundation’s Give a Dam campaign is fighting the state government’s plan to raise the dam wall and flood more of the Burragorang Valley and Blue Mountains national park – threatening endangered wildlife and culturally significant Indigenous sites.

Bushwalker Chantal Bronkhorst from Warrimoo, said the group, which comprises current and former Sydney University students, felt strongly about the fate of the area.

“The raising of Warragamba Dam is an issue that really resonates with the Sydney University Bushwalkers,” she said. 

“The southern Blue Mountains is the spiritual home of our club. This is the area where the very first walk occurred after SUBW was formed in 1946. 

“Even today, one of our main events is a long-weekend walk to the pristine Kowmung River, a declared wild river that will be directly impacted by the raising of Warragamba Dam.”

Ms Bronkhorst said the walkers were “pretty relaxed when it comes to nudity” and had now produced several calendars.

“Mostly they’re an excuse to have a bit of fun, but they have also helped us raise money for some important environmental causes,” she said.