Highest mountain in South Korea! Surprisingly well-established trail for adventurers to test their limits. Make sure you pack enough food and water for the hike - it's a 8-9 hour round trip.
If going from Seongpanak Entrance, halfway to the top there's a path to Sarahoreum Lake and observatory...beautiful and stunning (I went during autumn)
If you plan to go up, make sure you wear lace up shoes, bring water & sunscreen, camera and empty your bladder before climbing up. There is a toilet at the top & you can buy noodle for 1,500 Won.
Three days later and still sore legs but man what an amazing hike! Start not with the short intense side but rather the longer more gradual climb from bus 181 stop