Soyosan is small mountain located in Dongducheon City, Korea. It is only 536 meter from sea level. It has six prominent peaks, and the highest among them is Uisangdae.
I took a larger loop which travels all six peaks, and it took me about 3 and half hours.
Like most of mountains in Korea, there are sections of stairs and rock scrambling. It would take more time considering the length of the path.
