mountain systems are a group of mountain ranges with similarity in form, structure, and alignment that have arisen from the same cause, usually an orogeny. Take the Himalayan mountains for example.
Fresh waters are natural occurring waters except seawater and brackish water. for example they have lake Baikal,the Yangtze river etc.
Moss Lake Trail. because it is shorter therefore it will be steeper at the beginning as suppose to Summit trail since it has a higher elevation but is more spread out.