When they reach the top, a well-earned breakfast awaits. All that remains is a short interview and then the painful wait to find out if they have been selected as one of the British Army's newest trainee Gurkhas.
The Big Day
Having completed the final stages of selection in Pokhara, it's finally time for the applicants from Western Nepal to find out whether or not they've made it.
The night before the results are announced, the recruiting staff encourage the potential recruits to put on a show to ease the nerves.
The following day, the potential recruits must say their goodbyes.
If unsuccessful, the young men are unlikely to see their newfound friends again, and many will be heading home.
Because of the importance of the decision in the lives of these young men, our cameras are not allowed in the room where they will be given their verdict.
After being told by Major Sandy Nightingale whether they have been enlisted, a senior recruiting assistant known as a 'Gollowolla' directs candidates in the right direction.
Unsuccessful applicants are sent through the door on the left. They collect their travel expenses and recieve some feedback on why they were not selected. Successful candidates leave through the door on the right and sprint upstairs before anyone can change their mind!
"The stair is the barrier," explains Major Nightingale.
"As soon as they're up the stairs, they are no longer my responsibility and they're handed over to ITC Catterick."
For those who were unsuccessful, there is always next year, if they are still under 21 and can afford to make this journey again.
For the successful new recruits, it is a different story.
When asked how he feels upon passing the entrance tests, Training Rifleman Surya Bahadur Shrees is in disbelief.
"It is the best moment of my life."
Training Rifleman Kapiel Pradhan is in tears after receiving the news that, on his second attempt, he has passed all the tests and earned himself a place in the British Army.
"It's my dream come true."
Everything will change from this day for the new recruits.
"It's a big day for them, and it's a challenge for us as well," says Sergeant Suman Ale, an instructor at Gurkha Company in Catterick.