Eleanor Hawkins and her three co-accused have been sentenced to three days in prison and fined 5,000 Malaysian ringgit (£860), the BBC has reported.
Hawkins, from Derbyshire, Danielle and Lindsey Peterson, from Canada, and Dylan Snel, from the Netherlands, have already been held in custody for three days so are now expected to be deported, Sky News reported.
Original report below:
A 23-year-old British woman who posed naked on a mountain in Malaysia has pleaded guilty to a public nuisance offence.
Eleanor Hawkins, an aerospace engineering graduate, was arrested earlier this week after stripping on the top of Mount Kinabalu.
The region's indigenous Kadazan Dusun people believe the mountain is sacred and a recent earthquake, which killed 18 people, has been linked to the stunt.
On Friday, Hawkins appeared at Kota Kinabalu magistrates’ court, along with Danielle and Lindsey Peterson, from Canada, and Dylan Snel, from the Netherlands, The Guardian reported.
The newspaper said the four tourists arrived in handcuffs on Friday.
All four entered guilty pleas but questioned the claim that they told their guide to "shut up" and "go to hell" while on the mountain, Sky News reported.
The four Westerners were part of a larger group of 10 who climbed Mount Kinabalu at the end of last month.
malaysiakini: Four foreigners held for stripping atop Mt Kinabalu http://t.co/zjEjc9YxA9 #SabahQuake
Hawkins' lawyer, Ronny Cham, had earlier suggested the group could face three months in prison or be fined, or both, if found guilty.
A verdict could be announced later today, Sky News reported.