The Red trail is nice, it runs along the Middle Patuxent River, only one semi-steep hill. Easy access for the dogs to run in & take a quick dip. The GreenBlue trail is relatively flat, no hills (markers start green, then at a trail switch, can take the GreenBlue trail back out).
Went with my 11 yr old daughter for what I thought would be an easy ride, but after getting more into the ride, it turned out to anything but. At times we were on flat terrain. For hers and my skill level, it turned out to be more moderate than easy. The weather was iffy when we started but after getting into it we stopped paying attention to the rain / snow clouds in APRIL.
At the end of the beautiful hour and half ride in which we allowed ourselves to get lost before finding our way out without using my gps, I had an eager participant for future rides.