The trail is a course of hidden containers, called caches, that can be discovered by GPS or smartphone and follows the wetlands walk around Loch McNess.
Department of Parks and Wildlife (DPAW) park manager Julia Coggins said it gave them an opportunity to join a recent worldwide craze.
‘The Nyanyi-Yandjip geocache trail, named after the traditional tribal name of the park, will lead people through our stunning Australian bush, then when completed they share the details of their find to the world online,’ Ms Coggins said.
Bushrangers WA cadet program instructor Gary Thirlwell worked with cadets at the school to develop the geocache trail.
‘I had been introduced to geocaching by my nephew and thought that there was potential to develop a geocache trail with my cadet unit,’ he said.
‘We received some education funding from BP Australia to develop the trail and as we were holding our annual orientation camp at Yanchep National Park, we thought this would be the best location.
‘More than 30 students made several visits to the park to consider locations for the caches and it was decided the Wetlands Walk Trail was perfect.’
Park visitors can hire the geocache receivers and trail guide from McNess House for $10, plus a $50 deposit, after providing identification.