This post isn't mine, it's my good friend @loislangweiler, but I had to post it on this board because it reminds me so much of Colorado even though it's not! I just got home from a chilly-butt-cold walk, and so this post resonated!
Buck Mountain Trail is a 7 mile out and back trail located near Ringwood, New Jersey that features a river and is rated as difficult. The trail is primarily used for hiking, rock climbing & trail running and is accessible from April until October. Great views looking over Lake George, north west toward s the ADK high peaks. 2,000' of altitude gain makes it a great training hike for backpacking the AT.