Casco Bay Lines has run ferries between Portland and the islands of the bay for well over a century, and the service is both a lifeline for islanders and a bargain for visitors. The most popular trip is the short crossing to Peaks Island, about twenty minutes from the Portland waterfront. You step off in a small community of cottages, shops and cafes, with a paved loop around the island that is ideal for walking or cycling. Other ferries serve islands such as Great Diamond, Cliff, Long and Chebeague, and the operator also runs scenic cruises in season.
The charm is in the ordinary. Locals ride with groceries and bicycles, and you share the deck with them while the harbor slides by. Fort Gorges, ferries, fishing boats and the skyline all appear in turn. On the island, rent a bike near the landing or bring your own, and follow Island Avenue around the shoreline for roughly four miles, with views of the sea, ledges, summer houses and fortifications left from the wartime years. Beaches and small coves offer places to rest, and cafes and a general store provide supplies.
Peaks Island has its own set of curiosities, including the Fifth Maine Regiment museum, a former Civil War veteran hall, and old gun batteries from the coastal defense system. You can walk or bike to the batteries and look for the concrete bunkers hidden in the woods. Other islands offer different moods: Long Island and Cliff Island feel quiet and rural, while Great Diamond Island has a resort community. Plan according to the time you have and the ferry schedule.
Schedules change seasonally, with more frequent crossings in summer and fewer in winter, so check the timetable and the last return boat. Fares are modest, and bicycles and pets may carry extra charges. Bring layers, snacks and water, and note that services on the islands are limited. Weather can delay boats, so keep a margin if you have an evening commitment.
The ferry is a flexible way to add a half day without booking a tour. It pairs well with a morning trolley tour and a picnic lunch, and it appeals to families who want a low-cost adventure. If you prefer a guided experience, a harbor cruise or sea kayak tour gives more narration. Arrive early for the popular summer boats, and consider buying tickets online if the operator offers it.
What to expect
The experience
A scheduled passenger ferry from the Portland waterfront to Peaks Island and other bay islands.
Best time
Summer and early fall for the fullest schedule and warm weather.
How long
A twenty-minute crossing, plus as long as you like on the island.
Tips
Check the last boat back, bring layers and snacks, and rent bikes near the landing.
Quick picks
- Best for
- Families, cyclists and budget-minded sightseers.
- Families
- Cheap, fun and easy, with a safe loop to bike or walk.
- Couples
- A quiet escape with ocean views.
- Pair with
- A picnic lunch or a trolley tour.
- Time needed
- Half a day.
Good questions
How long is the ride to Peaks Island?+
About twenty minutes.
Can I bring a bike?+
Usually yes, sometimes for an extra fee. Rentals are also available on the island.
Are there food options on the island?+
Some cafes and a general store, but services are limited.
Does the ferry run in winter?+
Yes, on a reduced schedule. Check the timetable.
Are there other islands to visit?+
Yes, including Great Diamond, Cliff, Long and Chebeague.