Looking for short term accommodation in Marathon (FL) United States. Tranquility Bay Resort check in is after 4:00 PM and check out is before 11:00 AM. The Resort has rooms. The 4-star Tranquility Bay Resort offers comfort and convenience whether you’re on business or holiday in Marathon (FL). Offering a variety of facilities and services, the hotel provides all you need for a good night’s sleep. Take advantage of the hotel’s facilities for disabled guests, family room, restaurant, bar. Air conditioning, desk, balcony/terrace, alarm clock, telephone can be found in selected guestrooms. Enjoy the hotel’s recreational facilities, including fitness center, golf course (within 3 km), outdoor pool, fishing, massage, before retiring to your room for a well-deserved rest. No matter what your reasons are for visiting Marathon (FL), Tranquility Bay Resort will make you feel instantly at home.