Northwest Branch Stream Valley Unit 3 is a park located in Montgomery County, Maryland. It is a popular destination for outdoor activities such as hiking, biking, and fishing. The park offers several trails that wind through the picturesque landscape of the valley and provide stunning views of the surrounding hills. The trails are well-maintained and suitable for all skill levels, making it an ideal destination for families and outdoor enthusiasts.

One of the main attractions of Northwest Branch Stream Valley Unit 3 is its diverse wildlife. The park is home to a variety of animal species, including deer, foxes, and birds, which can be spotted along the trails. There are also several picnic areas scattered around the park where visitors can enjoy a meal while taking in the natural beauty of the surroundings.

Another point of interest in the park is the historic Diversion Dam, which was built in the early 1900s to divert water from the Northwest Branch of the Anacostia River to the Washington Suburban Sanitary Commission's treatment plant. The structure is an impressive feat of engineering and provides a glimpse into the history of the area.

The best time of year to visit Northwest Branch Stream Valley Unit 3 is in the spring and fall when the weather is mild and the foliage is at its peak. Summer can be hot and humid, while winter can be cold and snowy, making outdoor activities more challenging.

Overall, Northwest Branch Stream Valley Unit 3 is a beautiful park that offers a variety of outdoor activities and is worth a visit for anyone looking to escape the hustle and bustle of city life and reconnect with nature.