You would have to contact the park to be sure, but I do not believe there are any biking trails. Hiking and cross country skiing is the limit, so far as I'm aware. Trails and forest have only a thin layer of soil over sand dunes, which would be easily torn up by heavier use. https://www.michigan.org/property/pj-hoffmaster-state-park
Yes there are “some” trails for bikes but this place is mostly hiking. Many signs on most trails showing a bike with a circle and line through it. As a destination place for trail riding, look elsewhere. Trail riding while camping and beaching, yeah, it’s got enough to make it enjoyable.
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