They plan to climb Asia's highest volcano without the help of a high-altitude guide or porters.
But Mr Ashik Ashokan and Mr Ashok Kumar, both 24, are not doing it just for the thrill. They are embarking on this risky expedition next month to raise money for the Children's Cancer Foundation (CCF).
Mr Ashik told The New Paper: "We wanted to mirror the struggles of children with cancer, who have to climb their own 'mountains' every day.
"In fact, the struggles that we will go through on the mountain are nothing compared to what they go through."
The two undergrads, who met while in Innova Junior College and go by the name Heart2Climb, will be climbing Mount Damavand in Iran.
Mr Ashik is a communications and new media student at National University of Singapore and Mr Ashok is a business student at Singapore Institute of Management.
At 5,610m, Mount Damavand is 20 times taller than Singapore's tallest building, One Raffles Place.
On their last fundraising attempt in 2014, the duo trekked 220km on a Himalayan range, hitting a maximum altitude of 5,416m. They raised $50,000 for the Society for the Physically Disabled.
They chose Mount Damavand this time for the challenge as scaling it requires good fitness and determination.
It has harsh temperatures of more than 40 deg C at the bottom and subzero temperatures at the peak. They will also face volatile weather conditions, such as snowstorms. And there may be other surprises in the mountains.
"There are wild creatures at Mount Damavand, such as venomous vipers," said Mr Ashik.
But they are no strangers to danger, having climbed Mount Kerinci in Sumatra last year, a highly active volcano with a jungle known for its Sumatran tigers, he said.
Dr Kumaran Rasappan, 31, a surgical resident at Tan Tock Seng Hospital (TTSH), is mentoring the expedition.
In 2012, he became the first Singaporean to climb Mount Everest for a charitable cause, raising over $40,000 for needy patients at TTSH.
Climbing without a high-altitude guide can be challenging. Dr Kumaran also said that climbing on a volcano means dangerous terrain, with loose soil and rock.
But he is not unduly worried as they will be climbing a popular route during climbing season, when other climbers will be around.
All donations will go to the CCF. To donate, go to www.heart2climb.com or their Facebook page Heart2Climb
This article was first published on May 22, 2015.
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