not any mountain biking- just bigger road hills than I'm used to. Especially in the part of town right near the water. I haven't done any trail riding or true mountain biking. I can't seem to get my Husband interested in it. There are trails we could go on near home, but it is fairly flat compared with the western part of the state. There are some trails near Grand Haven in a county park-can't remember the name of it, but it's just south of the town on Lakeshore drive. Don't know if bikes are allowed or not.