Lock 21 Dive Site

← All sites

What you'll see (18)

Painted TurtleChrysemys pictaseen 6× near here

European CarpCyprinus carpioseen 4× near here

Common Snapping TurtleChelydra serpentinaseen 3× near here

Largemouth BassMicropterus nigricansseen 3× near here

Smallmouth BassMicropterus dolomieuseen 2× near here

Rock BassAmbloplites rupestrisseen 2× near here

Round GobyNeogobius melanostomusseen 2× near here

Fathead MinnowPimephales promelasseen 2× near here

American EelAnguilla rostrataseen 1× near here

BluegillLepomis macrochirusseen 1× near here

Freshwater DrumAplodinotus grunniensseen 1× near here

Iowa DarterEtheostoma exileseen 1× near here

Brook SticklebackCulaea inconstansseen 1× near here

FallfishSemotilus corporalisseen 1× near here

Zebra MusselDreissena polymorphaseen 1× near here

Marsh RamshornPlanorbella trivolvisseen 1× near here

Rusty CrayfishFaxonius rusticusseen 1× near here

Virile CrayfishFaxonius virilisseen 1× near here

Planning a trip

8–12 days

worth going for

Long haul, usually two flights.

14,860km from Singapore — about 24h each way, so two of those days are travel. 2 dive sites within 25km.

When people dive it

Busiest Jun, Jul, Sep · almost nobody dives it Jan, Feb, Mar, Nov, Dec.

From 778 logged sightings — when divers are in the water, which is not quite the same as when visibility is best.

Dive Crew is a dive group from Singapore. Members plan trips here, log their dives, and share their photos of each site.

Been given an invite code? Create an account

Moon and tides

Waning gibbous

71% lit · day 20 of the lunar month

Neap tides

Neap tides — the smallest range of the month, so the weakest currents. Easy conditions and usually the clearest water, though a drift site may barely drift.

New 10 Oct Full 26 Oct

Phase computed here, not fetched. This is the spring/neap cycle, which sets how hard the water moves — not a tide table: no free source publishes high and low water for Southeast Asian reefs, and the range peaks a day or two after the moon does, by an amount that varies with the coast. For times on the day, ask the operator.

Getting there

14,860km from Singapore, and outside the part of the world this app knows the gateways for — the list covers the diving the crew actually does. Rather than invent a flight, here is the site on a map.

📍 Lock 21 Dive Site on Google Maps

Details

Island: Mille Roches Island
Country: Canada
Marks: 44°59.850'N 74°53.959'W
Position: 44.9975, -74.8993

Site website →

Where it is

Loading the map…

Nearby

Sightings and photographs from iNaturalist contributors, research-grade records within 6km, under Creative Commons licences. Counts are what divers and snorkellers have bothered to log — a common fish with few records is common all the same.