Nature, Biology And Mountain Climbing is not an easy matter as I imagined. Understandably, I have beginners who like to see the vlogs of professional climbers on YouTube. Why am I interested in hiking? first, because I really like the cool fresh air in the mountains. Secondly, I really liked the beautiful scenery, especially looking at the sea of clouds that seemed to be under our feet when it reached the top of the mountain. Third, because I am a biology teacher candidate, I feel I have to know a lot and explore the nature around me, so that when I teach in class, I can tell real things about us, not just from books. And for my first ascent, I chose Gunung Lawu, besides being close to my hometown, Lawu also has its own charm that I cannot reveal. On Friday, December 29, 2017, me and my group of six people started the journey from the city of Madison to Cemoro Sewu. Before arriving at Cemoro sewu, we chose to stop at the Magetan mosque to do Friday prayers and midnight prayer...