Can you bring your own food to N Seoul Tower?
The park half
Namsan Park, the trails and the summit plaza are open ground on a public hill, not a gated attraction, and they are not bound by the tower’s indoor opening hours. Local people walk up with a coffee and sit out on the terraces, and I do it most weeks. In summer the walk is hot and humid enough that water stops being optional; the routes and how long they take are on walking up Namsan.
Eating afterwards instead
The places to eat inside the building are expensive and pitched at people who are already there. I am not quoting hours, prices or menus for any of them, because I have not verified them and that is precisely the sort of detail that changes. Myeongdong is twenty to twenty-five minutes downhill and feeds you better for less, and walking down is the easier half of the hill. What there is to do up there before you go is on what to do at the tower.
Frequently asked questions
Can I bring food to N Seoul Tower?
Into Namsan Park and up to the summit plaza, yes — it is public open space and people picnic there daily. For the ticketed indoor levels, assume normal indoor-attraction rules and ask at the ticket hall on the day.
Can I bring water up Namsan?
Yes, and you should. The climb from Myeongdong is twenty to twenty-five minutes of continuous uphill and Seoul summers are humid. The walk is described on walking up Namsan.
Is the food at the tower expensive?
The restaurants inside are priced for their location and aimed at visitors. Eating afterwards in Myeongdong or Itaewon is better value, and the walk down there is quicker than the climb up.