The ATV park has trails and tracks...open to ATVs and bikes. They also have a youth track right by the parking lot...one with small jumps, the other is just a small circle track with no jumps so it's a great place to work with the kids. Its right off 218...Look for the O'Reily Autoparts, turn there and cross the railroad tracks...follow the signs.
How many acres of land do they have in Waterloo and how good are the trails? I'm in Omaha and I have a short trip to Council Bluffs for some trails but it is nothing great. Also, I can go to Halsey National Park but that is about 4 hours west, which is about the same as Waterloo.