With more than 12 miles of trails within Houston's version of New York City's Central Park, Memorial Park is the closest thing inside the city limits available to a mountain biker looking to ride that fancy bike to its intended use. Ranging from beginner to intermediate to advanced, the trails are marked and color-coded for easy use. The harder trails are mostly loose gravel and dirt, so be sure you can handle yourself before taking them on, or you'll risk serious injury.