Fall is absolutely the best time to for a stroll or hike around all the parks to go leaf peeping
when the leaves start to change colors.
Among the Cleveland Metroparks, my #1 recommendation if you do only one hike would be Rocky River Reservation.
Go up to Fort Hill for breathtaking views. The climb up the stairs is worth it.
Within the Lorain County Metro Parks system, Schoepfle Garden & Cascade Park would be my personal recommendation. The Garden is just absolutely stunning & the waterfall at Cascade is a gorgeous hike.