Watchung Mountains, Mountain range in northern New Jersey, United States.
The Watchung Mountains consist of three parallel ridges of volcanic origin stretching about 40 miles from Somerville to Mahwah. The range contains multiple parks and nature preserves with hiking trails that lead through varied terrain.
During the American Revolution, General George Washington established military encampments in these mountains to monitor British troop movements between New York and Philadelphia. This strategic position played a key role in the campaigns of that era.
The name comes from the Lenape language and means "High Hills," reflecting the deep connection to the land of indigenous peoples. The area has long been a gathering place near mountain streams and water sources.
Visitors can explore the hiking trails year-round to see rare plants and wildlife living in the parks and preserves. Wearing sturdy footwear and bringing a trail guide or map helps you get the most from your visit.
The ridges formed around 200 million years ago when magma cooled into basalt layers, creating distinctive rock formations. These ancient stones are especially visible along Interstate 280 and tell the story of the region's volcanic past.
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