They do. You can find them in events on Facebook. And, there is a chalkboard at center listing weekly schedule as well as a newsletter.
Events are no longer on Facebook, but on the Peoria Park District Website now: https://webtrac.peoriaparks.org/wbwsc/webtrac.wsc/search.html?type=&subtype=&age=&keyword=Forest+Park+Nature+Center&primarycode=&module=AR
They do on Facebook. Also if you were interested in a hiking group for the Peoria area then try the Meetup app on Android. There are plenty of other group activities available as well.
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