The bike paths at Forest Park are great fun, if you have a bicycle. If you don't: not so much.
Now, persons 16 or older with a valid drivers license and a credit card (or $100 for a deposit) can rent bikes in Forest Park and pedal through one of the nation's largest and most beautiful urban parks.
The bikes (adult-sized Schwinn cruisers) are available outside the park's Visitor Center for daytime riding. They cost $10 an hour or $35 a day (with half day rentals for $25). There are helmets and locks available so that riders can keep their heads and bikes safer.
Mark Erker, the guy who operates the Boathouse and lobbies for doggy dining, also runs the bike rental operation.