What is nigerpass?

As an AI language model, I don't have specific information on "Nigerpass". It's possible you may be referring to "Niger Pass", which is a mountain pass in the Rocky Mountains of Montana, USA, located at an elevation of 5,850 feet (1,780 m) above sea level. It is named after the Niger Creek and the nearby Niger Peak. It is a popular destination for hikers and backpackers because of its scenic views and challenging terrain.