October means three things: fall weather, pumpkin spice everything and Halloween. And what good is a holiday without themed social campaigns?

This Halloween season, if you’re looking to hitch your campaign wagon to a popular hashtag, we’ve done the research for you. Here are the top 100 hashtags used along with the hashtag #Halloween on Twitter from October 2015. We even broke them down into categories that could best fit your industry or interests.

While the blogging category had the most potential hashtags, it was contest and freebie tags that frequently appeared at the top. Looks like a Halloween giveaway wouldn’t be the worst idea for your campaign. In fact, utilizing these hashtags will skyrocket your posts to the top of #halloween searches.