Sorry, I have no clue when tick season ends but I would venture to guess when the weather turns cooler. I can certainly understand how you feel!! Our yard was what I call "infested" a couple months ago - I pulled 3 off Gage after he was only outside for about 15 minutes! Luckily for me, hubby has a side job (when he's not at the fire station) doing pest control so he sprayed the yard not once, but twice to get rid of them - haven't had any since then on either Gabby or Gage
Here's hoping it ends soon for you!