The area is open daily 5 a.m. - 10 p.m.; Han Eol Square, Peace Square and Meeting Square stay open until midnight.
Admission is free.
Wikipedia https://en.wikipedia.org/wiki/Olympic_Park,_Seoul
Official website http://www.olympicpark.co.kr/jsp/english/contents/guide/info.jsp
Phone +82 2 410 1114
Address 424, Olympic-ro, Songpa-gu, Seoul, South Korea
Coordinates 37°31'16.813" N 127°6'57.557" E