Moderate level of activity, good trails, recreational. Hard to maneuver around crowds, suggest to take the earlier tours as crowds get thicker as the day passes specially on the popular spots
Our tour guide called in sick but we were offered all day bike hire instead. Bike paths are easy to follow so not only did we get right up the waterfront past Lincoln park but we visited zoo and then went back down through millennium and grant parks to visit aquarium. Really good day 6 hours of easy biking.