Acadia National Park Tours ( tel. 207/288-0300) offers 2.5-hour park tours from mid-May through October, departing twice daily (10am and 1pm) from downtown Bar Harbor. The bus tour includes three stops (Sieur De Monts Springs, Thunder Hole, and Cadillac Mountain) and imparts plenty of park trivia, courtesy of the driver. This is an easy way for first-time visitors to get a quick introduction to the park before setting out on their own side trips. Tickets are available at Testa’s Restaurant (at 53 Main St.) in Bar Harbor; the cost is $45 for adults, $22.50 for children 12 and under.

Frequent ranger programs are offered throughout the year at Acadia. These include talks at campground amphitheaters and tours of various island locales and attractions. Examples include an Otter Point nature hike, walks across the carriage roads’ stone bridges, cruises on Frenchman Bay (rangers provide commentary on many trips), and discussions of the changes in Acadia’s landscape—there was even a small earthquake here in October 2006, causing rock slides that still keep a few trails closed more than a decade and a half on. Ask for a schedule of park events and more information at any visitor center or campground.

Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.