20th year the Sourland Mountain Festival brings the communities of Central New Jersey together with the best in musical talent, local food and drink, family fun – and a spectacular view! Proceeds from the Sourland Mountain Festival benefit the Sourland Conservancy, a non-profit organization that works to protect the Sourland Mountain region. The 90-square-mile Sourland region is home to the largest contiguous forest in Central New Jersey. The sparsely populated area includes parts of Somerset, Hunterdon and Mercer counties, and encompasses a complex ecosystem of forest, wetlands and grasslands. The Sourlands are currently under the threat of losing One Million Trees due to the Emerald Ash Borer