We did a 5.5 mile loop with the kids (3, 11, 15... the 3 year old was in a backpack) and they did great. It took us 2 hours to go on the outside of all the loops.

A local favorite with many choices in trails. The Alltrails suggested trail is actually a combination of trails that takes you around the perimeter of the preserve. That being said, the trails are the best marked I've encountered with numerous markings, "you are here" maps throughout. So pick your trail, or cover them all!