Molasses

reef in Key Largo

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Details

Open Water

Minimum Recommended Certification

Max Depth	90 ft
Average Depth	30 ft

Access

Permanent Mooring Balls

GPS coordinates

25° 00.612' N
80° 22.507' W

Frequently visiting operators

	Horizon Divers
	Conch Republic
	Rainbow Reef Dive Center
	Silent World Scuba Center

🎥 The Key Largo Dude

Upcoming trips (108)

Operator	Date	Time	Availability click-to-book	Trip Name click for details
Rainbow Reef Dive Center	2025-01-09	08:30	Y	Spiegel Grove,Hole in the Wall
Rainbow Reef Dive Center	2025-01-19	08:30	Y	Spiegel Grove,Molasses Reef
Rainbow Reef Dive Center	2025-12-13	08:30	Y	Eagle Ray Alley,Fire Coral Cave
Rainbow Reef Dive Center	2025-12-13	13:30	Y	Sand Island,Molasses Reef
Rainbow Reef Dive Center	2025-12-13	13:30	Y	North Star,Nine Channel
Rainbow Reef Dive Center	2025-12-13	08:30	Y	Winch Hole,Aquarium
Rainbow Reef Dive Center	2025-12-13	08:30	Y	Hole in the Wall,Wellwood
Sea Dwellers	2025-12-14	08:30	23	Molasses Reef: Hole In The Wall & Fire Coral Cave
Rainbow Reef Dive Center	2025-12-14	13:30	Y	JJs Cave,Coral Canyons
Rainbow Reef Dive Center	2025-12-14	08:30	Y	USCGC Duane,Molasses Reef
Rainbow Reef Dive Center	2025-12-14	08:30	Y	Spanish Anchor,Nine Channel
Rainbow Reef Dive Center	2025-12-14	08:30	Y	Hole in the Wall,Aquarium
Sea Dwellers	2025-12-15	13:00	20	Molasses Reef: Aquarium & North Star
Rainbow Reef Dive Center	2025-12-15	08:30	Y	Spanish Anchor,Eagle Ray Alley
Rainbow Reef Dive Center	2025-12-15	13:30	Y	Coral Canyons,Aquarium
Sea Dwellers	2025-12-16	13:30	13	Molasses Reef: Winch Hole & Eagle Ray Alley
Rainbow Reef Dive Center	2025-12-16	08:30	Y	USCGC Duane,Permit Ledges
Rainbow Reef Dive Center	2025-12-16	08:30	Y	Eagle Ray Alley,JJs Cave
Rainbow Reef Dive Center	2025-12-17	08:30	Y	Coral Canyons,Spanish Anchor
Rainbow Reef Dive Center	2025-12-17	08:30	Y	RaceTrack,North Star
Rainbow Reef Dive Center	2025-12-17	13:30	Y	Aquarium,Winch Hole
Rainbow Reef Dive Center	2025-12-18	08:30	Y	Nine Channel,Spanish Anchor
Rainbow Reef Dive Center	2025-12-18	08:30	Y	USCGC Duane,Molasses Reef
Rainbow Reef Dive Center	2025-12-18	08:30	Y	Hole in the Wall,Aquarium
Rainbow Reef Dive Center	2025-12-18	13:30	Y	Coral Canyons,Fire Coral Cave
Rainbow Reef Dive Center	2025-12-18	08:30	Y	North Star,Eagle Ray Alley
Rainbow Reef Dive Center	2025-12-18	13:30	Y	Aquarium,Snapper Ledge
Rainbow Reef Dive Center	2025-12-19	08:30	Y	Aquarium,Eagle Ray Alley
Rainbow Reef Dive Center	2025-12-19	08:30	Y	Aquarium,Eagle Ray Alley
Rainbow Reef Dive Center	2025-12-20	08:30	Y	Eagle Ray Alley,Fire Coral Cave
Rainbow Reef Dive Center	2025-12-20	13:30	Y	North Star,Nine Channel
Rainbow Reef Dive Center	2025-12-20	08:30	Y	Winch Hole,Aquarium
Rainbow Reef Dive Center	2025-12-20	08:30	Y	Hole in the Wall,Wellwood
Rainbow Reef Dive Center	2025-12-20	13:30	Y	Sand Island,Molasses Reef
Sea Dwellers	2025-12-21	08:30	27	Molasses Reef: Hole In The Wall & Fire Coral Cave
Rainbow Reef Dive Center	2025-12-21	13:30	Y	JJs Cave,Coral Canyons
Rainbow Reef Dive Center	2025-12-21	08:30	Y	USCGC Duane,Molasses Reef
Rainbow Reef Dive Center	2025-12-21	13:30	Y	Pickles Reef,Permit Ledges
Rainbow Reef Dive Center	2025-12-21	08:30	Y	Spanish Anchor,Nine Channel
Rainbow Reef Dive Center	2025-12-21	08:30	Y	Hole in the Wall,Aquarium
Sea Dwellers	2025-12-22	13:00	5	Molasses Reef: Aquarium & North Star
Rainbow Reef Dive Center	2025-12-22	08:30	Y	Spanish Anchor,Eagle Ray Alley
Rainbow Reef Dive Center	2025-12-22	13:30	Y	Coral Canyons,Aquarium
Conch Republic Divers	2025-12-22	13:00	13	Molasses x2
Sea Dwellers	2025-12-23	13:00	13	Molasses Reef: Winch Hole & Eagle Ray Alley
Rainbow Reef Dive Center	2025-12-23	08:30	Y	Coral Canyons,JJs Cave
Rainbow Reef Dive Center	2025-12-23	08:30	Y	USCGC Duane,Permit Ledges
Rainbow Reef Dive Center	2025-12-23	13:30	Y	Wellwood,Hole in the Wall
Rainbow Reef Dive Center	2025-12-23	08:30	Y	Eagle Ray Alley,Aquarium
Rainbow Reef Dive Center	2025-12-24	08:30	Y	Coral Canyons,Spanish Anchor
Rainbow Reef Dive Center	2025-12-24	08:30	Y	RaceTrack,North Star
Rainbow Reef Dive Center	2025-12-24	13:30	Y	Aquarium,Winch Hole
Rainbow Reef Dive Center	2025-12-25	13:30	Y	Coral Canyons,Fire Coral Cave
Rainbow Reef Dive Center	2025-12-25	13:30	Y	Aquarium,Snapper Ledge
Rainbow Reef Dive Center	2025-12-26	08:30	Y	Snapper Ledge,Molasses Reef
Rainbow Reef Dive Center	2025-12-26	08:30	Y	Aquarium,Eagle Ray Alley
Rainbow Reef Dive Center	2025-12-27	08:30	Y	Eagle Ray Alley,Fire Coral Cave
Rainbow Reef Dive Center	2025-12-27	13:30	Y	Sand Island,Molasses Reef
Rainbow Reef Dive Center	2025-12-27	13:30	Y	North Star,Nine Channel
Rainbow Reef Dive Center	2025-12-27	08:30	Y	Winch Hole,Aquarium
Rainbow Reef Dive Center	2025-12-27	08:30	Y	Hole in the Wall,Wellwood
Conch Republic Divers	2025-12-27	08:00	-	Molasses x2
Sea Dwellers	2025-12-28	08:30	9	Molasses Reef: Hole In The Wall & Fire Coral Cave
Rainbow Reef Dive Center	2025-12-28	13:30	Y	JJs Cave,Coral Canyons
Rainbow Reef Dive Center	2025-12-28	08:30	Y	USCGC Duane,Molasses Reef
Rainbow Reef Dive Center	2025-12-28	13:30	Y	Pickles Reef,Permit Ledges
Rainbow Reef Dive Center	2025-12-28	08:30	Y	Spanish Anchor,Nine Channel
Rainbow Reef Dive Center	2025-12-28	08:30	Y	Hole in the Wall,Aquarium
Sea Dwellers	2025-12-29	13:00	3	Molasses Reef: Aquarium & North Star
Rainbow Reef Dive Center	2025-12-29	08:30	Y	Spanish Anchor,Eagle Ray Alley
Rainbow Reef Dive Center	2025-12-29	13:30	Y	Coral Canyons,Aquarium
Sea Dwellers	2025-12-30	13:00	21	Molasses Reef: Winch Hole & Eagle Ray Alley
Rainbow Reef Dive Center	2025-12-30	08:30	Y	Coral Canyons,JJs Cave
Rainbow Reef Dive Center	2025-12-30	08:30	Y	USCGC Duane,Permit Ledges
Rainbow Reef Dive Center	2025-12-30	13:30	Y	Wellwood,Hole in the Wall
Rainbow Reef Dive Center	2025-12-30	08:30	Y	Eagle Ray Alley,Aquarium
Rainbow Reef Dive Center	2025-12-31	08:30	Y	Coral Canyons,Spanish Anchor
Rainbow Reef Dive Center	2025-12-31	08:30	Y	RaceTrack,North Star
Rainbow Reef Dive Center	2025-12-31	08:30	Y	Fire Coral Cave,Wellwood
Rainbow Reef Dive Center	2025-12-31	08:30	Y	Drift Molasses,Molasses Reef
Rainbow Reef Dive Center	2025-12-31	13:30	Y	Aquarium,Winch Hole
Rainbow Reef Dive Center	2026-01-01	13:30	Y	Coral Canyons,Fire Coral Cave
Rainbow Reef Dive Center	2026-01-01	13:30	Y	Aquarium,Snapper Ledge
Rainbow Reef Dive Center	2026-01-02	08:30	Y	Snapper Ledge,Molasses Reef
Rainbow Reef Dive Center	2026-01-02	08:30	Y	Hole in the Wall,Wellwood
Rainbow Reef Dive Center	2026-01-02	13:30	Y	Coral Canyons,Spanish Anchor
Rainbow Reef Dive Center	2026-01-02	08:30	Y	Spiegel Grove,Hole in the Wall
Rainbow Reef Dive Center	2026-01-02	08:30	Y	Aquarium,Eagle Ray Alley
Sea Dwellers	2026-01-04	08:30	30	Molasses Reef: Hole In The Wall & Fire Coral Cave
Sea Dwellers	2026-01-05	13:00	28	Molasses Reef: Aquarium & North Star
Conch Republic Divers	2026-01-05	13:00	23	Molasses Reef
Sea Dwellers	2026-01-06	13:00	30	Molasses Reef: Winch Hole & Eagle Ray Alley
Sea Dwellers	2026-01-11	08:30	30	Molasses Reef: Hole In The Wall & Fire Coral Cave
Sea Dwellers	2026-01-12	13:00	26	Molasses Reef: Aquarium & North Star
Sea Dwellers	2026-01-13	13:00	29	Molasses Reef: Winch Hole & Eagle Ray Alley
Sea Dwellers	2026-01-18	08:30	24	Molasses Reef: Hole In The Wall & Fire Coral Cave
Sea Dwellers	2026-01-19	13:00	26	Molasses Reef: Aquarium & North Star
Sea Dwellers	2026-01-20	13:00	30	Molasses Reef: Winch Hole & Eagle Ray Alley
Sea Dwellers	2026-01-25	08:30	30	Molasses Reef: Hole In The Wall & Fire Coral Cave
Sea Dwellers	2026-01-26	13:00	28	Molasses Reef: Aquarium & North Star
Sea Dwellers	2026-01-27	13:00	30	Molasses Reef: Winch Hole & Eagle Ray Alley
Sea Dwellers	2026-02-01	08:30	30	Molasses Reef: Hole In The Wall & Fire Coral Cave
Sea Dwellers	2026-02-02	13:00	30	Molasses Reef: Aquarium & North Star
Sea Dwellers	2026-02-03	13:00	30	Molasses Reef: Winch Hole & Eagle Ray Alley
Sea Dwellers	2026-02-08	08:30	30	Molasses Reef: Hole In The Wall & Fire Coral Cave
Sea Dwellers	2026-02-09	13:00	30	Molasses Reef: Aquarium & North Star
Sea Dwellers	2026-02-10	13:00	30	Molasses Reef: Winch Hole & Eagle Ray Alley
Sea Dwellers	2026-02-15	08:30	30	Molasses Reef: Hole In The Wall & Fire Coral Cave

Visibility is often very good at this site

📸 John Lorange

Aerial view of the lighthouse near Molasses reef

📸 Randy Rother

The winch

📸 Carry Day

All species of coral call this place home

📸 Key Largo Foundation

Elkhorn coral are a rare species that can be found here

📸 Pablo Strika

Grunts hide behind some corals

📸 Pablo Strika

The shallow part of Molasses makes it an ideal dive for beginners

📸 Pablo Strika

Best Gas

show details

Diluent mix

Oxygen 21%

Helium 35%

Nitrogen 47%

Gas prices

Diluent tank	$35.50
O2 tank	$10.00

Diluent

Diluent PPO2 at max depth (90 ft) 0.9 atm

O2 Content Diluent

Set Point 1.2 atm

Set Point

END at max depth (90 ft) ft

He Content Diluent

O2 narcotic?

Loop temperature at depth °F/°C

Loop temperature

Consider H2O vapor?

Gas density g/L

Hypoxic at surface

Calculate Best Diluent

Gas mix

Oxygen Bottom PPO2

Helium Bottom PPO2

Nitrogen Bottom PPO2

Gas prices

Aluminum 80	$10
Steel HP 100	$10
Steel LP 85	$10

NDL at 90 ft - 24 hr min surface interval - m

Calculate NDL

Always use a dive computer

Nitrox

PPO2 at max depth (90 ft) Bottom PPO2 atm

PPO2 at average depth (30 ft) Bottom PPO2 atm

O2 Content

32%

Calculate Best Nitrox

Decompression planning

Site Description

Route

Typical Conditions

Divers' Uploaded Pictures

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