Where to advertise?

Hello, this is my first forum post so I hope I'm doing it right. I am working with a team of wildlife enthusiasts in Brighton and they have just launched some new accessible wildlife events in the area (see my profile post for more). Unlike many other wildlife events these are all designed to focus on urban wildlife and be accessible to all, with the events taking place on stable, level ground.

The events themselves are hosted on Airbnb and the group has a facebook page. I have also listed them on Euan’s Guide and WhereWeCanGo. I was wondering if anybody had any advice for places to advertise such accessible events? Where do you look to when you want to find an outdoor activity that is accessible?