The bridges loop (Main Street and Acosta) or looping on the Acosta by way of Riverside makes a nice ride. Friendship park is there for other skills practice (not trials though).
There’s always the new market under the Fuller Warren on Saturdays. I haven’t checked that out but it sounds nice.
I’m in this area weekly on Thursdays. There are plenty of joggers, bicyclists, and skateboarders. Unicyclists are outnumbered. 
Greetings Jacksonvillians (and otherwise), from your neighbor to the South 
Cross-posting from here to say that I’ll be up north (…-er, at least) to Santos for this Sunday if anyone would like to meet up. BrianP is likely, and I may have some other Tampa/Sarasota crew members in tow as well.
Also continued welcome for anyone who swings down this Gulf Coast direction, for meet-ups urban or muni either one.
Enjoy your weekend and enjoy your ride in any case
billnye
John M
Dang. . .I’m headed to Key West this weekend, otherwise. . .
hey
Hi, My name is Luka. I was looking for unicyclists in jacksonville. I live also on baymeadows. I hope you still live here. I m not from USA. I m in visit here. I have my weel with me here. maybe we can met sometime. I m in jacksonville 2 and 1/2 months more.