| Acadia Fishing Tours / Vagabond | June 15 through September 15; closed all Sundays & Friday afternoon in July & August |
| Acadia Repertory Theatre | June - September |
| ArtWaves | year round |
| Atlantic Brewing Company | closed for the winter |
| Bar Harbor Cellars | Late May to Mid-October |
| Camp Beech Cliff | Year-round, M-F 8-5. Summer camp starts June 20 |
| Camp Capella, Inc. | Year Round |
| Charlotte Rhoades Park and Butterfly Garden | April 15 to October 1, 2018 |
| Clark Point Gallery | To visit the gallery, call 207-669-2066 to arrange a time |
| Cranberry Cove Ferry | Memorial Day Weekend through September 30 |
| Downeast Friendship Sloop Charters | Daily Mid- May until Oct, 9am-sunset |
| Down East Nature Tours | All year |
| Downeast Windjammer Cruises | May 15 through October 19: Friday and Saturday @ 2pm and Sunset cruise. Weather permitting |
| Island Arts Association | Shows throughout the year - check our Events page! |
| Island Cruises | Open mid-June through early October; daily thru Labor Day weekend |
| Maine State Sea Kayak | early June through late September |
| Mansell Boat Rentals & Charters | Opening May 11 |
| MDI Community Sailing Center | office: Monday - Friday 9AM - 4PM |
| Mount Desert Island Historical Society | Daily 10 to 4 |
| Mt. Desert Oceanarium | mid-May to late October |
| National Park Canoe and Kayak Rental | Opening May 16 |
| National Park Sea Kayak Tours | Open early June through late September |
| Quietside Cruises | May - Oct |
| Salty Dog Gallery | 10AM to 4PM or by appointment |
| Seal Cove Auto Museum | 10 am - 5 pm daily from May 1 through October 31 |
| Sea Princess Cruises | Late May thru Late October |
| Southwest Cycle | Mon-Sat 9:30- 5:00 Sun.10- 4:00 |
| Southwest Harbor Artisans | Closed for the winter |
| Southwest Harbor Public Library | MON, TUES, THURS & FRI: 9:00am - 5:00pm WED: 9:00am - 8:00pm SAT: 9:00am - 1:00pm CLOSED SEPT. 21 |
| The Maine Granite Industry Historical Society | April 1 to November 31 Tuesday - Sunday 10am - 4pm. Winter months by appointment. |
| Tremont Historical Society | MWF 1:00-4:00 p.m. July thru Columbus Day or by appointment |
| Wendell Gilley Museum | Fri & Sat 10-4 through December 16 |
| Beal's Lobster Pier | re-opening May 2018: But call to place an order to be shipped |
| Cafe 2 / Eat-A-Pita | We are closed for the season and will reopen Memorial Weekend 2018. Thank you for a wonderful summer. |
| Cafe Drydock | We will be reopening for the 2018 Season the middle of May! |
| Claremont Boathouse | closed for the winter |
| Coda | Open Thursday - Saturday, 4pm to close (Closed April 22 to May 16) |
| Red Sky Restaurant | closed for winter break - open for Valentine's Day! |
| Sips | Monday-Saturday for Breakfast, Lunch and Dinner from 7am-9pm and Sundays for Breakfast from 7am-Noon (Closed April 15-22) |
| Thurston's Lobster Pound | re-opening May 25, 2018 at 11AM |
| Xanthus Restaurant & Bar at the Claremont Hotel | closed for the winter |
| XYZ Restaurant | closed for the winter |
| Acadia Cottages | 2018: May 16 - Oct 16 |
| Anna's Quietside Cottages | All Year |
| Ann's Point Cottages | All year |
| Ann's Point Inn | June - Oct |
| Bass Harbor Cottages | Opening April 7, 2018 |
| Bass Harbor Inn | Open May 18 |
| Claremont Hotel & Cottages | Closed for the winter |
| Cranberry Hill Inn | May - Oct |
| Drydock Inn | Open Year Round! |
| Fernald Cottages | All year |
| Harbor View Motel and Cottages | Opening May 1, 2017 |
| Harbour Cottage Inn Bed and Breakfast and Pier One Vacation Rentals | Opening May 26 |
| Hutchins Cottages at Acadia | Memorial Day - Columbus Day |
| Kingsleigh Inn | Mid-May through Mid-October |
| Lindenwood Inn | Open May thru October |
| Moorings Inn Waterfront and Cottages | All year - cottages available year round |
| Penury Hall | All year |
| Quietside Campground | June 20 through Columbus Day |
| Seawall Campground in Acadia National Park | closed for the winter |
| Seawall Motel | Open February - December Closed January |
| Smuggler's Den | Memorial Day Weekend to October 25th |
| The Lodge-ings at Southwest Harbor | All year |
| YWCA of Mount Desert Island | All Year |
| Acadia Cornerstone Real Estate | Year Round |
| Bar Harbor Bank and Trust | All year. Lobby: 8:30-4:00 M-Th; 8:30-5:00 F. Drive-Up: 8:30-5:00 M-F. |
| Bayside Graphics | Year Round |
| Bowden Marine Service | M-F 8am-5pm. Also, May 1 to Columbus Day, Sat 9am-noon |
| Camden National Bank | M-Th 8:30-4, F 8:30-5 |
| Coastal Builders and Sons, Inc | M-F: 9am-4pm, Sat: 9am-3pm |
| Dunbar Real Estate | Office M-F, 9:30 - 4:30, and by appointment ~ call or e-mail 24/7 |
| Dysart's Great Harbor Marina | year round |
| Eastern Maine Recycling | Monday - Friday 8AM to 5PM; Saturday 8AM to 3PM |
| First National Bank | Seal Cove Road Drive-Up: Mon-Wed 7:00AM - 4:30PM and Thurs-Fri 7:00AM - 5:00PM Main Street Lobby: Mon-Thurs 8:30AM - 4:00PM, Fri 8:30AM - 5:00PM and Sat 8AM-12PM |
| G.F. Johnston & Associates | Year Round |
| Harbor Ridge Vacation Rentals | All year, 8am-9pm |
| Homer Associates - The Birches | All year |
| Islandscaping, Inc. | Daily 9AM to 4PM thru October 7 |
| L. S. Robinson Insurance | M-F 9am-4:30pm |
| L. S. Robinson Real Estate & Vacation Rentals | M-F 9am - 4:30pm |
| MDI Property Maintenance & Management | All year |
| Norumbega Moving and Storage | 8 A.M. - 4 P.M. Monday through Friday |
| Pro31 Cleaning Solutions, Inc. | Monday - Saturday 8AM to 8PM |
| Royal Promotions | M-F 9am-5pm |
| Smart DataMap Services | M-F 9am - 6pm |
| Stephen Stanley, Electrician | M-F 7am-4pm. Anytime for emergencies. |
| The Hinckley Company | M - F, 9am to 4pm |
| The Knowles Company | M-F 9am-5pm |
| Carroll Drug Store | Store: M-F 8:30am-6pm, Sat 9-3 Pharmacy: M-F 9-5:30, Sat 9-noon |
| Clark Point Gallery | To visit the gallery, call 207-669-2066 to arrange a time |
| Dragonflys Cottage | Closed for the winter..see you in the spring! |
| Island Arts Association | Shows throughout the year - check our Events page! |
| Liquor Locker Inc. | Mon - Thurs 9:30 - 6PM Fri & Sat 9:30 - 7PM closed Sunday |
| McEachern and Hutchins | M - F 7 am-5 pm Sat 8am-4pm, Su 9 am-3 pm |
| Quilt 'n' Fabric | T-Su 9am-4pm |
| Salty Dog Gallery | 10AM to 4PM or by appointment |
| Sawyer's Market | 5:30 AM to 6:00 PM Summer Hours until 8:00 PM |
| Sawyer's Specialties | Wednesday - Saturday 10 am - 6 pm |
| Southwest Harbor Artisans | Closed for the winter |
| Under the Dogwood Tree | M-F 10-5, Sa 10-3 |
| Westside Florist | M-F 9-5, Sa 9-noon |