The Knowlton September 11th Memorial is located along Route 94 across from Brook Hollow Winery, on a 42-acre property maintained by The Nature Conservancy. The memorial site is part of a vast, 1500-mile trail network, called The September 11th National Memorial Trail. This large trail network, comprised of on-road and multi-use trail, connects the World Trade Center, the Pentagon, and the Flight 93 site. The portion of the trail that runs through Columbia NJ makes a seamless connection between the Paulinskill Valley Rail Trail and the Columbia Wildlife Management Area.

The trail and memorial are open year-round to the public. Visitors can enjoy the peaceful seasonal garden beds, which were designed and installed by the Warren County Pollinator Protectors (WCPP). Highlights include red buds, red maples, New England aster, and other native plants. The garden beds and surrounding flower fields are maintained by the WCPP.

The members of WCPP would like to thank Race's Farm for supplying native trees and flowers for this project at a discounted rate.