ADF Joins Hunt for Missing Teen Bushwalker Near Sydney

The Australian Defence Force has joined the search for an 18-year-old woman missing for four days in rugged bushland south-west of Sydney, as emergency services race against worsening weather and difficult terrain.

Lily Hooper was last seen leaving a home on Burragorang Road at Oakdale at 8am on Wednesday. Her abandoned car was subsequently located, raising fears she had ventured into the surrounding bush on foot.

The search — now in its fourth day — has drawn a significant multi-agency response, with police, SES volunteers and now ADF personnel combing the area. The Burragorang Valley region is known for its dense bushland and steep escarpments, presenting searchers with some of the most demanding conditions in the greater Sydney basin.

Authorities have not disclosed what prompted Hooper to leave on foot, but the discovery of her vehicle has focused search efforts on a defined zone. Aerial assets have been deployed to cover ground that is difficult to reach on foot, though deteriorating weather conditions have complicated those efforts.

The ADF's involvement signals an escalation in both the urgency and scale of the operation. Defence personnel bring additional manpower and specialist equipment, including communications and navigation support in areas where mobile coverage is limited.

Families of missing persons in remote terrain face an agonising wait as search coordinators balance the need for thoroughness against the physical limits of personnel operating in challenging conditions. With each passing day, the focus on Lily Hooper's welfare has intensified.

Anyone with information about Hooper's movements or whereabouts is urged to contact police immediately. The search is expected to continue through the coming days, with conditions closely monitored by the incident command team.