[1] Garret Mountain is Passaic County's major recreational area, providing the visitors with grass fields, several miles of walking/running trails, basketball courts, picnic areas, Barbour's Pond is state stocked with fish for anglers, as well as an Equestrian Center with horseback riding lessons.

For the past several decades, the reservation has been the site of hundreds of high school and college cross country meets in the fall, including the New Jersey State Interscholastic Athletic Association (NJSIAA) High School State Sectional Championships at the end of every October.

It was built in 1892 by Catholina Lambert and was added to the National Register of Historic Places in 1976 for its significance in art, architecture, and industry.

Since the park is an oasis of woodland surrounded by urbanity, Garret Mountain is a stopover point for migrating song birds, including 35 species of warblers, numerous vireos, orioles, sparrows and thrushes.

Birdwatchers from the tri-state areas flock to this hotspot for great views of over 150 species per year along the easily accessible trails.