While small, Kelleys Island has a surprisingly good trail system, along with scenic & quiet country roads with vistas of the lake. A great place to start is the East Quarry Trails with access off Monagan Road just north of the air field. This network of hiking trails loops the old, overgrown quarry area and runs through recent growth forest. The Kelleys Island State Park also has numerous old double-tracks looping another quarry.
To reach Kelleys Island hiking, use the Newman Boat Line from Marblehead.
Overall, East Quarry Trails is the 13th most popular hiking trail of all 26 hikes in Ohio.