Why Buyers Love Pennington NJ: Historic Charm, Trails & Location One of my favorite things about Pennington Borough is how much character you get without feeling disconnected. Tree-lined streets, Colonial and Victorian homes, nearby trails, vineyards, and green space give Pennington its small-town feel, while Princeton and New Hope are both roughly 20 minutes away. For buyers looking for charm, outdoor access, and convenience in Mercer County, Pennington is worth considering.