Question

is this a run-on sentence?

We walked for what seemed like hours through more doors and hallways and saw eighteen more guys in suits and sun glasses.

Answer 1

Somewhat. It needs more punctuation. Such as
We walked for what seemed like hours, through more doors and hallways. We saw18 guys posted around wearing suits and sunglasses.
Just an idea. I may have butchered it it, but i hope it gives you some creative ideas

Answer 2

actually that helped, thank you

Answer 3

Sure thing:) Glad it helped