|Location||Goesan-gun, Chungcheongbuk-do and Mungyeong-si, Gyeongsangbuk-do|
|Height of the Mountain||931m|
Daeyasan covers parts of Cheongcheon-myeon, Goesan-gun, Chungcheongbuk-do and Gaeun-eup, Mungyeong-si, Gyeongsangbuk-do. It's 931m high above sea level and belongs to the Songnisan national park, past Baekhwasan (Mt.) and Huiyangsan (Mt.) and before reaching Songnisan (Mt.) along Baekdu Daegan Mountain System. There are beautiful valleys such as Seonyudonggyegok (Valley), Yongchugyegok (Valley), toward Chungcheongbuk-do, and Hwayanggugok (Valley) toward Gyeongsangbuk-do. It is also called Daehasan, Daehwasan, Daesan, Sangdaesan etc. but according to Mungyeonghyeonji (old document) published in 1789, it's written as Daeyasan. Hiking generally starts from Beolbawi (Rock) in Gaeun-eup, past Mungyeong-si (city) over Ihwaryeong (Ridge).
Walking on the newly-built road along the valley, you can look up a monument marked by extraordinary rocks. This is Yongchugyegok (Valley), with a stone monument carved as Mungyeongpalgyeong (8 views of Mungyeong) at the entrance. Considered the best among spectacles of Yongchugyegok (Valley), Yongchupokpo (Water fall) is composed of 3 tiers and forms a unique heart shaped tub in the center of whitish gray granite.
On both sides of Yongchu there are rocks engraved in intaglio as Sesimdae, Hwalcheongdam, Okhadae, Yeongchaseok etc.
Ascending about 20 minutes from Yongchu leads you to Woryeongdae where you can see moonlight reflected on rocks and valleys. This is the point where two streams from Daraegol (Valley) and Piagol (Valley) join together. Along the valley it takes about 2 hours to reach the top. Around the summit slopes are steep and trails are rugged so you'll have to clamber up the rocks and plow your way through the brush. On the top there is a rock of about 10 pyeong (33.05m2) where stands a wooden signpost with the name of the mountain on it and you can outlook a cluster of mountain peaks. From the summit at the center, the north is Bullanchijae (Ridge) and the south is Miljae (Ridge).
Descending the mountain could be to Bullanchijae via Chotdaebong (Peak) but the trail is rugged and it takes about 7 hours in total along this route. So most people descend toward Miljae because it takes about 5 hours along the south ridge. Miljae is a pass that borders Gyeongsangbuk-do with Chungcheongbuk-do. Take an express bus from downtown of Mungyeong to Gaeun-eup and transfer to an urban bus bound for Beolbawi (Rock). There is a birth place of Yi Gangnyeon, a general of loyal army in Wanjang-ri, Gaeun-eup close to the mountain.