It would be Passaic County, along Greenwood Lake, 4 miles from the N.Y. state border and a fine restaurant that overlooks the lake. My daughter takes her Scorpio-born silver Terv down to the lake for swimming and retrieval because she is the only dog of the four who is untrainable, lol. Truly a free spirit, that doggie, but dangerous for anyone who would attempt harm. I know what you mean about memories, I used to swim in that lake in my teens.
She is between Ringwood State Park and Hewitt State Forest, a truly gorgeous area. The New Jersey stretch of the Appalachian Trail is 74 miles long and begins at Abram S. Hewitt State Forest in the northern most point and runs west and south through Wawayanda State Park, High Point State Park, Stokes State Forest, ending at Worthington State Forest.
Too many folks think N.J. is nothing but the turnpike but I made sure my children grew up in nature. Some good stuff in that little state.