Despairing police had to stop 10 people from London in two separate cars travelling to climb Snowdon in Wales during the coronavirus lockdown.
The group were issued with fines after driving to Penyfan and Snowdon.
They were all reported for breaching Covid-19 legislation, reports Wales Online.
North Wales Police said: "We despair - we really do... Please, please, please stay home.
"The coronavirus is affecting every part of the UK, nowhere is immune to it.
"Now is not the time to come to the national park for a walk. The beautiful mountains will still be here and we will gladly welcome you all back once this is all over."
Car usage has crept up again across the UK as the country enters its sixth week of lockdown.
Ministers fear that relaxing strict measures, currently in place until May 7 at least, could result in a second spike of coronavirus cases and more deaths.
The convoy journey follows a similar incident on Thursday, after a couple, also from London, were stopped in their car by police on their way to climb Snowdon.
They were also reported for offences under the Covid-19 legislation and were sent on their way.
Snowdonia National Park Authority has closed the busiest mountains in Snowdonia including Snowdon, Cader Idris, Aran Benllyn, Aran Fawddwy and those in the Ogwen Valley, including Tryfan, Cwm Idal, Y Garn and Glyderau. All car parks and information centres have also been shut.
Two people from Bristol have also been issued with fines after being caught trying to climb Pen Y Fan during lockdown.
The Brecon Roads Policing Unit tweeted on Sunday that the pair were stopped on the A470 before they attempted their ascent up the highest peak in the Brecon Beacons.
"Covid-19 tickets were issued and both were advised to return to their home address in Bristol," a spokesperson said.
Wales' three national parks are all closed, but that hasn't stopped a minority of people from travelling to them.
Similarly, two men and two women from Cardiff were fined after they called to be rescued after getting lost on a Rhondda mountain earlier this month.
