The Little Flat Brook is a charming 12.7-mile-long tributary of the Flat Brook in Sussex County, New Jersey. This pristine stream originates near Layton, NJ, and flows generally southwest until its confluence with the Big Flat Brook, forming the main stem of the Flat Brook. The Little Flat Brook is part of the larger Delaware River watershed. While not primarily known as a paddling destination, the Little Flat Brook offers a tranquil setting for nature enthusiasts and anglers. The stream is characterized by flatwater conditions and is not suitable for whitewater paddling. Its excellent water quality makes it a prime habitat for various fish species, particularly trout, attracting fly fishing enthusiasts.

Access to the Little Flat Brook can be challenging, as there are no established trails along much of its length. Anglers and explorers often need to bushwhack and wade upstream to reach prime fishing spots. The creek's remoteness contributes to its pristine condition and appeal to those seeking solitude in nature.

The Little Flat Brook flows through the historic Walpack Valley, part of the broader Minisink region. This area holds significant cultural importance, with a rich history dating back to early European settlement and Native American habitation. The surrounding landscape is characterized by dense forests and occasional clearings, providing habitat for diverse flora and fauna typical of the New Jersey Highlands region.

Key access points for the Little Flat Brook are limited, with the most notable being near Layton, NJ. Visitors should be prepared for a more rugged, off-trail experience when exploring this stream. The nearby Delaware Water Gap National Recreation Area offers additional outdoor recreational opportunities and serves as a good base for those interested in exploring the Little Flat Brook area.

Safety considerations include being prepared for remote conditions, as cell phone coverage may be limited in parts of the valley. Anglers should be aware of local fishing regulations and obtain necessary permits. The best times to visit are typically late spring through early fall, though the stream's excellent water quality supports year-round fishing opportunities for those properly equipped.

While multi-day trips are not typical on the Little Flat Brook itself, the stream can be part of a broader exploration of the Flat Brook system and the surrounding Delaware Water Gap region. Visitors can combine fishing or nature observation on the Little Flat Brook with hiking in the nearby forests or exploring the historic sites of the Walpack Valley for a rich, multi-day outdoor experience in this scenic corner of New Jersey.