Explore Maine By Ferry

Select a location below to get fares, schedules, vehicle reservation info and more.

Located on the west bank of the Penobscot River in Prospect, Maine, in an area known as the Penobscot Narrows, Fort Knox is one of the best-preserved military fortifications on the New England seacoast. The fort has many unique architectural features, as well as a rich history behind its walls.

The Penobscot Narrows region is rich in transportation history. Prior to the construction of the Waldo-Hancock Bridge, a ferry regularly carried passengers across the Penobscot River. In 1929, the Maine legislature authorized $1.2 million in 30-year bonds to build the Waldo-Hancock Bridge, with the understanding that the cost would be recouped by tolls. What began as a traffic necessity to accommodate the increasing number of northbound travelers on Route 1 soon became a historical and economic landmark as well as an example of engineering innovation.

Rates and Hours

There is no limit to the time you can spend in the observatory, but please understand that there are others waiting to visit.

Observatory Hours

• May 1 to June 30: 9 AM to 5 PM
• July 1 to August 31: 9 AM to 6 PM
• Sept 1 to Oct 31 : 9 AM to 5 PM

Fort Knox is open from May 1 through October 31 from 9AM to 6PM, and open until 7PM from July 1 through October 31. Park grounds are open year-round from 9AM to sunset.

Innovative Engineering

The Penobscot Narrows Bridge and Observatory is located in the heart of midcoast Maine. The bridge spans the Penobscot River, linking the town of Prospect with Verona, just south and a bit downriver from the town of Bucksport.