13 Best National Parks to Visit in the US This Summer

7. Acadia National Park, Maine: Rugged Coastlines and Maritime Beauty

Acadia National Park, perched on Maine's rugged Atlantic coast, offers summer visitors a unique combination of rocky shorelines, pristine forests, and granite peaks that create one of America's most distinctive coastal wilderness experiences. The park encompasses over 47,000 acres on Mount Desert Island and the Schoodic Peninsula, where the meeting of land and sea has created a dramatic landscape of pink granite cliffs, secluded coves, and tide pools teeming with marine life. Summer brings optimal conditions for exploring the park's 158 miles of hiking trails, including the challenging Precipice Trail with its iron rungs and ladders that lead to spectacular cliff-top views, and the more moderate Ocean Path that follows the shoreline and provides access to Thunder Hole, where waves crash into a narrow inlet creating thunderous sounds and spectacular spray displays. Cadillac Mountain, at 1,530 feet the highest point on the East Coast north of Brazil, offers panoramic views of the Atlantic Ocean, Frenchman Bay, and the surrounding islands, while serving as one of the first places in the United States to see the sunrise during certain times of the year. The park's carriage road system, originally built by John D. Rockefeller Jr., provides 45 miles of gravel roads perfect for cycling, walking, and horseback riding, featuring 17 historic stone bridges and access to pristine lakes and forests without the intrusion of motor vehicles. Summer's mild temperatures and extended daylight hours create perfect conditions for tide pooling along the rocky shores, where visitors can discover sea anemones, periwinkles, hermit crabs, and other marine creatures in the intertidal zone. The park's diverse ecosystems support over 40 mammal species and 270 bird species, including peregrine falcons that nest on the granite cliffs, while the surrounding waters provide habitat for harbor seals, porpoises, and occasionally whales that can be spotted from the shore or during boat tours.