The Marangu route is a popular route and also the cheapest. It is the only route that offers mountain huts instead of tents for the overnight stays. The route leads straight up to the summit and down again via the same route. Altitude changes per day are significant, which is why this route is only suitable for experienced climbers.
The ascent via the Marangu route takes a total of five days. However, it is recommended to add an extra day to give your body time to adjust to the high altitude. If you choose to do so, you can stay an extra night in Horombo huts on the fourth day and make an acclimatization hike. This extra day significantly increases your chances of reaching the summit.