I went to Korea summer of 23. It was awesome. Surfed climbed and downhill mtb. They get after it one there and it’s a beautiful country. On a few of the climbing days I went with a few locals and they were telling me about all the amazing ice. They pointed out one waterfall in the distance near or in Seoraksan NP where we were climbing that they claimed to be like 300m. Obviously, I was there in the summer but I would imagine if the conditions were good there would be ice to be had. The whole peninsula is covered in beautiful mountains, it is worth a visit! Seoul is cool too