A year after a Dublin man went missing while hiking in a US national park, his family are again appealing for information to help locate him.

Cian McLaughlin, 27, was last seen at Grand Teton National Park in Wyoming on Tuesday 8 June 2021.

His car was later found parked near the Lupine Meadows trail head at the National Park.

Speaking on RTÉ's Morning Ireland, his mother, Gráinne McLaughlin, who is in Wyoming, said walkers and mountaineers are being asked to look out for her son’s personal items - a red iPhone, red watch, sun glasses and a silver chain.

She said he was very familiar with the trail and having walked it herself, said it "was not a difficult trail at all".

Grand Teton National Park is 70km long and 40km wide and comprises more than 300,000 acres of mountainous land with lakes and rivers.

Ms McLaughlin said Cian "was very outgoing, friendly and sociable kind of guy."

She said he worked as a snowboard instructor during the winter and in a bar during the summer and was drawn to Wyoming "because of the mountains, for the skiing and for the summer hiking and loving the outdoors".

She said that "from everybody’s point of view, we know that he went missing in the mountains, he went missing on this hike and something tragic happened".

A massive operation was launched last year when Mr McLaughlin was reported missing, with park staff, search and rescue dogs and a search helicopter involved.

Yesterday, it was reported that a woman who provided US authorities with false information during the search was fined $17,600 (€16,500).

Heather Mycoskie, 40, previously of Jackson, Wyoming, knowingly provided false information and a false report, authorities said.

We need your consent to load this rte-player contentWe use rte-player to manage extra content that can set cookies on your device and collect data about your activity. Please review their details and accept them to load the content.Manage Preferences

Ms McLaughlin said it was upsetting to know that valuable time was lost in the search, but said: "We were informed of this during our last visit. We were here in October before the winter snow closed the search activity down.

"But we very quickly put that behind us to refocus on the higher mountain areas and now that we are back here in Wyoming as the snow begins to melt, the rangers have continued to study the map and terrain and identify other search areas."

Gráinne McLaughlin appealed to hikers to be on the look out for Cian's personal items

Ms McLaughlin said they are now hoping to refocus people's attention to the higher mountain areas although she said that conditions on the ground at present are very dangerous.

"Being here now at the anniversary, there is still quite a lot of snow...and then we have high temperatures which is melting the snow at a rapid rate and it just makes the conditions on the ground very, very dangerous, especially in the higher areas," she said.

Teton Park Superintendent CJ Adams said that valuable time which was wasted could have been focussed on "searching areas of higher probability".

"As a direct result of false information, approximately 532 hours were spent conducting searches, managing search efforts, conducting follow-up investigations and concluding reports," he said.

"We had an investigation reveal that an individual last summer provided a false report and false information in the search for Cian McLaughlin and per a deferred prosecution agreement, that individual is banned from Grand Teton National Park for a period of five years and was ordered to pay restitution in the amount of $17,600.

"The search will continue until we locate him," he said.