From ArborWiki

Frog Island Park is a popular park in Ypsilanti next to the Huron River and immediately adjacent to Depot Town. It is dominated by a soccer field in the center around which runs a gravel track. The southern slope features a small amphitheater. In the summertime it is host to many events including Elvisfest, the Michigan Beer Festival, and until recently, the Frog Island Jazz and Blues Festival.

It is connected to Riverside Park by the tridge.