We did a 10 day Bara Bhangal Trek, alpine style. There is no place to fill ration on the way, so our backpacks ended up weighing almost 25 kgs. We even carried some crackers with us due to possible bear attacks along the way. The weather was quite unpredictable and we had to cross some really aggressive glacial rivers. Along with that, the gaining and losing of altitude multiple times really made the trek extremely challenging.