Bramble Break DC

[LankyOgre]

Good Day y'all. I'm trying to figure out a break DC for a wall of brambles. I can find the table for walls and doors, but I'm having trouble finding break DCs for more naturally occurring obstacles. Specifically, I'm running Rise of the Runelords and I know I have a player that is going to try to cast enlarge person on herself while in the

Spoiler:

bramble maze at the beginning of the assault on Thistletop.

Since Enlarge Person allows a strength check or you stay the size of the room, I'm trying to figure out what to tell her. Manacles and Chains are only a break DC of 26 and rope is 23. I'm leaning towards placing it somewhere in between those. If anybody is aware of specific resources or comparisons, I'd love to be pointed in the right direction.

[avr]

Does treating it as a wall of thorns spell seem reasonable? I don't know anything much about the situation in the module.

[LankyOgre]

I looked there, but wall of thorns does not have a break DC either. Normally it probably wouldn't be possible to break the wall, its pliable enough that you would just move some of it around. Therefore both sources just have rules for dealing damage with a slashing weapon to cut it away. I'm thinking that enlarge person on a raging barbarian might have the chance to break or burst the "wall" right ubove her though.