
Three Waters Resort and Marina
Best for resort-style stays with many on-site restaurants, a full-service marina, multiple pools and family-or-adults options.
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Three Waters Resort and Marina is a large, full-service Islamorada resort with multiple pools, restaurants, a 72-slip marina and family + adults-only options; read this if you want a resort with marina activity, lots of on-site dining, and water-sport access. Bayside Inn Key Largo is a casual, budget-conscious bayside Key Largo hotel with a private beach and one pool; read this if you want a simpler, centrally located base for visiting John Pennekamp and Upper Keys attractions.
Updated · about 24 km (about 15 miles) apart

Best for resort-style stays with many on-site restaurants, a full-service marina, multiple pools and family-or-adults options.

Best for travelers who want a straightforward, bayside Key Largo hotel with a private beach, free parking and one convenient on-site restaurant.
When Three Waters Resort and Marina wins: choose Three Waters if you want a full-service resort experience — multiple pools (including an adults-only Cove), on-site oceanside massages/spa services, a 72-slip marina and many dining venues and bars across the property.
When Bayside Inn Key Largo wins: pick Bayside Inn if you want a simpler, lower‑complexity stay in central Key Largo with a private beach, one outdoor pool, free self-parking and easy access to John Pennekamp Coral Reef State Park.
Bottom line: Three Waters is the choice for guests who want a resort with broad amenities, marina energy and varied dining; Bayside Inn is the practical pick for budget-conscious travelers who want straightforward bayside convenience near Key Largo attractions.
| Category | Three Waters Resort and Marina | Bayside Inn Key Largo |
|---|---|---|
| Overall vibe | Resort-scale, activity-heavy (marina, many dining venues, day-pass use) | Casual, no-frills bayside hotel geared toward convenience |
| Location | 84001 Overseas Hwy, Islamorada — on 15 waterfront acres at MM 84 | 99490 Overseas Hwy, Key Largo — central Key Largo, close to John Pennekamp |
| Size (rooms) | 214 rooms, suites and cottages | 56 air-conditioned rooms |
| Who it's for | Families, groups, couples; also has a 21+ adults-only enclave (The Cove) | All ages — budget-conscious travelers and families |
| Pools & beach | Three year-round pools (including a 21+ Cove pool) and multiple beaches | One outdoor pool and a private beach |
| Restaurants & bars | Many on-site options (Kindler Wood-Fired Fare, Little Limón rooftop, Tiki Bar, Kokomo swim-up bar, pizza, ice cream, Starbucks, etc.) | One on-site restaurant plus casual food options; on-site restaurant serves meals |
| Spa & wellness | Oceanside massages / Ooh La La spa treatments and open-air fitness (24‑hr facilities noted) | 24-hour fitness center on site; no full spa listing in supplier facts |
| Marina & boating | Full-service marina with 72 slips and fishing/charter access | No full-service marina listed; water-sport activities nearby |
| Family vs adults options | Family-friendly overall with a dedicated adults-only (21+) Cove area | Family- and group-friendly (not adults-only) |
| Parking & transport | Self-parking included via nightly resort fee; complimentary Rum Runner water taxi to sister properties | Free self parking on site; nearest major airport: Miami Intl. Airport (MIA) ~99.5 km per supplier |
| Pet policy | Welcomes dogs (fee and limits apply; $150 non-refundable per room per stay) | Pet fee USD 75 per pet, per night; service animals exempt |
Three Waters sits on 15 waterfront acres in Islamorada (mile marker 84), close to local attractions and the resort collection's other properties.
A better pick if you want a waterfront resort location with marina access and on-property transport to nearby sister resorts.
Bayside Inn Key Largo sits in central Key Largo with quick access to John Pennekamp Coral Reef State Park and nearby Upper Keys sites.
A convenient base for visiting Key Largo attractions and snorkeling/diving sites without resort-scale grounds.
Three Waters offers a broad selection of accommodation types from standard rooms to multi-bedroom suites and cottages.
More variety and larger-suite options at Three Waters, plus explicit adults-only room categories.
Bayside Inn Key Largo lists 56 air-conditioned rooms and several waterfront-view room types.
Simpler room set with waterfront options suitable for couples and families seeking basic in-room conveniences.
Three Waters emphasizes multiple on-site culinary venues ranging from a signature wood-fired restaurant to a swim-up bar and a historic tiki bar.
Choose Three Waters if you value many varied on-site dining and bar options so you rarely need to leave the property.
Bayside Inn Key Largo has a single on-site restaurant and straightforward dining for guests.
Bayside Inn works well for guests who plan to eat off-property or want uncomplicated on-site dining.
Three Waters centers much of its offering on water access: three pools, multiple beaches and a full-service marina.
A better fit for guests focused on pool time, boating, fishing charters and a broad set of beach experiences.
Bayside Inn Key Largo provides a private beach and a single outdoor pool for guests.
Pick Bayside Inn for straightforward beach access and a single pool without the larger marina infrastructure.
Three Waters combines fitness and spa services with nightly entertainment at venue-specific bars and live-music nights at the Tiki Bar.
Stronger on-site wellness and nightlife programming, especially for guests who want evening venues and spa services on property.
Bayside Inn Key Largo offers a 24-hour fitness center and access to nearby Key Largo nightlife and activities.
Bayside Inn is functional for active guests who plan to use local operators for excursions and nightlife off site.

Three Waters — many distinct venues from a signature wood-fired restaurant to a rooftop bar, swim-up bar and historic tiki bar.

Three Waters — full-service 72-slip marina with fishing charters and the deepest channel in the Upper Keys.

Bayside Inn Key Largo — central Key Largo location, short drive to John Pennekamp Coral Reef State Park.

Bayside Inn Key Largo — simpler hotel with private beach, one pool and free self-parking.
Three Waters Resort and Marina has many on-site restaurants and bars (including a signature wood-fired restaurant and a rooftop), so it’s the better fit.
Bayside Inn Key Largo is centrally located in Key Largo and the supplier notes it’s a short drive from John Pennekamp.
Neither property is entirely adults-only. Three Waters includes The Cove, a 21+ resort-within-a-resort; Bayside Inn Key Largo is not adults-only.
Yes. Three Waters has multiple beaches and three year-round pools (including an adults-only Cove pool). Bayside Inn Key Largo lists a private beach and one outdoor pool.
Explore how Three Waters Resort and Marina stacks up against other hotels nearby:
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