Living In ... Mountainside, N.J.

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Visitors to Echo Lake Park can fish in the lakes and streams, which are stocked each spring with rainbow trout, or take advantage of the many paved and unpaved trails throughout the 147-acre park.

Laura Moss for The New York Times

Living In ... Mountainside, N.J.

Like other desirable places, Mountainside is dealing with the transformation that inevitably occurs when outsiders discover a “hidden treasure.”