The mother of an Irishman who went missing while hiking in the US state of Wyoming has appealed for the public's help in finding him.

Cian McLaughlin was last seen on 8 June.

Although the official search operation has been scaled back, family members have continued to walk the hiking trails where he was last seen in the hope of finding answers.

Cian's mother Gráinne spoke to RTÉ News while searching alongside her brother and her partner in Grand Teton National Park.

Cian McLaughlin was last seen on 8 June (Pic: Sargent Schutt)
Gráinne McLaughlin, her brother and her partner search for Cian

"Cian was an outgoing guy who loved the outdoors," she said.

"This is not a rescue, it is a recovery but I'd like to bring him home. I know he is up there somewhere," she added, gesturing to the mountains nearby.

Gráinne recalled when she travelled to the US in the days following Cian's disappearance.

"I went through a huge amount of grief at that time. We arrived on 17 June and pretty much two days later we were told this was a recovery operation. That was really hard," she said.

Cian's family has launched a major social media campaign using the hashtag #FindCian.

His uncle, Colm O'Higgins, says they are appealing to the public for information.

Colm O'Higgins appealed for anyone who might have spoken with Cian

"Knowing Cian as being very sociable and chatty, he definitely would have talked to people and so someone may remember having seen him on the trail," Mr O'Higgins said.

"Our appeal is to anybody who was in the park around June 8th and who may have taken photos. We are asking them to have a look at their pictures and see if there is someone in the background. They can share them with us at bringcianhome@gmail.com," he said.

Grand Teton National Park hit the headlines last month after the body of Gabby Petito was found there. She had disappeared while on a cross country trip with her fiancé, Brian Laundrie.

The discovery brought an end to a high-profile missing persons case.

Now, Cian McLaughlin's family are also looking for closure.

When he was first reported missing, a massive rescue mission swung into action.

Dozens of park rangers and volunteers were involved along with dog teams and helicopters.

After days of searching, however, the operation was scaled back.

Grand Teton National Park Chief Ranger Erika Jostad said: "The search for Cian won't end from our perspective until we find him."

"Tactics shift over time. We are coming towards winter and we expect the snow to fall. That will make some of the clues we are looking for a little more difficult to find," she said.

But until the snow makes it impossible to do so, Cian McLaughlin's mother Gráinne has vowed to continue her search.

"I am thinking of Cian at every moment and trying to connect with him and my hope is to bring him home, to have some resolution and bring him home," she said.