There are four Dog Days - Tails in Trails - each year in March, May, September, and November. Dogs are not allowed at any other time.

Ok

Yes you are only allowed to bring dogs on those days

They do not allow dogs on days they are not dog days.

I didn't see any dogs when we were there.

Didn't see anyone bringing pets when we visited

That is correct. Only on the designated day are dogs allowed.