Hiking Club/trail maintenance events

I suspect that many hikers do not realize that the trails that they enjoy are maintained by volunteers from local hiking clubs.  It would be good if you could implement a feature that would allow clubs to post trail maintenance days that could be searched by date and state, or within a chosen radius of zip code.   i.e a calendar of trail maintenance events, with contact info for club/event leader.  This should be include for web and phone apps.