The South Sister, also known as Charity, is Oregon's third highest mountain. The hike to the top is very difficult, but fairly easy as far as climbing mountains can go, as there is indeed a trail that goes all the way to the top and can be done without any technical mountain climbing gear. The hike can easily be done in a day, and usually takes between 7 and 10 hours round trip. The hike to the top is about 6 and a quarter miles long with a 4900 feet elevation gain. As you hike you will pass Moraine Lake, and the Lewis and Clark glaciers. At the top of the South Sisters you will find Oregon's highest lake Teardrop Pool. It is the tallest of the Three Sisters, outdistancing both Middle Sister and North Sister. As well as being the third tallest mountain in the state of Oregon. It is the youngest, geologically speaking having the most recent volcanic activity of the Three Sisters. Highest describes the lake that sits right near the summit, Teardrop Pool, being the highest lake in Oregon. South Sister has one popular route that can be climbed with little technical skill or equipment during the summer. This is the south side route and starts from either Green Lakes or Devils Lake. The route requires only descent physical conditioning and a tolerance for massive amounts of scree. There is also another class 4 route ascending between the Lewis Glacier and Prouty Glacier that offers snowfields and small waterfalls during the summer while avoiding the crowds as well as the dusty, rotten scree route mentioned above. However, this route does not follow a well-worn trail as the Southern route does.