It was a very good workout to walk the trail, the view is very impressive and the ruins that you go by are very historical, I grew up in Paterson and never really explored the entire reservation, It brings back many fond memories and would recommend it to anyone who wishes to breath crisp air during this time of the year. The view is phenomenal of the NY Skyline and the Paterson basin and downtown area. The Lambert Castle is another historic building that can be visited as well.
great place to walk with the entire family, very dog friendly. if you walk around the trails you will see wildlife. if you walk the bike/pedestrian lane adjacent to the one way road that wraps around garrett it is a great workout too. there is an incline but it is easy to complete. you can make it more challenging by making your own route using the incline areas.
Just went today, I found the trails clean of any debris/garbage as others had complained of. Next time I will bring my dog, was sort of nervous after reading all the reviews, but again, I saw no problems. Just wish the trails were marked a little better, go confused and turned around sometimes.