Yes, it depends on which ones you want to try. Check the website.
Several trails to chose from with educational opportunities along the way. They vary in length.
Yes, you choose which ones that you want to hike. They vary in length.
There's several, none are very long but I believe a few connect to each other and if I remember correctly there's a bike path nearby too. But the mounds are great and it's only a few dollars to see the museum. Very much worth it! The staff is great too.
Yes, there are several trails. The website is www.fortancient.org and it lists about 2.5 miles of trails. Most are easy to moderate and 1 is a bit difficult with some steep hills. Well worth taking the trails to see the views of the Little Miami River valley!
There are many trails and roads suited to cars and bikes. Some of the trails go steeply downhill and there are stairs for some of these parts. The trails are marked as to length but the steepnesses vary widely.
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