先是將車停在停車場，看到附近有Campground，猜想這裡是應該是個蠻熱門的旅遊區吧。
Mount Bachelor was formed between 15,000 and 11,000 years ago as a shield volcano but was later capped with a stratovolcano as the eruptions apparently became more explosive over time. It is the youngest prominent volcano in the Three Sisters area of Oregon. Bachelor is composed mainly of Basalt and Basaltic_andesite.
It last erupted between 10,000 and 8,000 years ago and is entirely covered with Mazama Ash from the catastrophic eruption of Mount Mazama about 6,845 years ago. There is no geothermal activity at present, though some areas popularly thought to be fumaroles are caused by air movement through the porous structure. Several are near the top of the Pine Marten chairlift and occasionally present a hazard to skiers and snowboarders where the snow is undermined.
Climbing to the summit of the South Sister from Devil's Lake Trailhead.
Overview: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 (12 round trip) with a 4900 feet elevation gain.
The mountain itself is a volcano that is around 50,000 years old and last erupted 2000 years ago.
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.
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