I just think so. Most people were walking the gardens. I don’t think you can ride bikes there, but the rest of the park should be ok.
I believe you can. Make sure you read the Florida State Park Rules. When you go to their website, you will be given the option to write which park you are going to. Just navigate towards the park rules. It's a very good and easy to understand website.
I have never seen anyone bicycle in the garden. Fairly sure it's not permitted. Walking is very nice here and the place is sized and designed for it.
From the Florida State Parks website, Maclay section:
"Description: The Lake Overstreet portion of the park offers approximately five miles of multi-use trails that can be used for hiking, biking, or horseback riding. These trails afford views of Lake Overstreet and a ravine system that rivals those of North Georgia. In addition, approximately three miles of designated bike trails provide scenic biking on the Overstreet property. Lake Overstreet is for use by wildlife only, and for scenic viewing by people. The park offers a limited number of bicycles for rent. Check for availability at the Ranger Station as you enter the park. Helmets are highly recommended for all cyclists and Florida law requires helmets for cyclists age 16 and under."
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