List so far

... L'Anse a L'Orme Beach : Pierrefonds montreal gazette aug30, 1973
The L'Anse a L'Orme river used as a dump February 20 1975 North Shore News

September 21, 1978 North Shore News

L'Anse a L'Orme Beach 2009 (not used)
http://en.wikipedia.org/wiki/L'Anse-à-l'Orme_Nature_Park

Cap St Jacques Beach: 1950 Map

1950's map L'Anse a L'Orme Beach, Cap St Jacques Beach, Crystal Beach and Roy Beach

Cap St Jacques beach 2009, in use today.

Crystal Beach  or Lot 201  the number 201 goes to 1879 or 1924 maps defining the boundaries in the west island territory.

Crystal beach 2009 (not used)

"Housing development planned for crystal beach" May 11, 1967 North Shore News

Crystal beach on year 1924 map. Gordon and Gotch's map of the Island of Montreal compiled and drawn by Albert E. Dumont c1924 

Gordon and Gotch's map of the Island of Montreal compiled and drawn by Albert E. Dumont c1924 

Mario Grelee owned Crystal Beach May 22 , 1973 "...these area should be saved for our future needs"

Roy Beach

Roy beach or the Pierrefonds' water treatment plant.  Pierre Leclerc, died working on the upgrade.

City worker killed in accident

Noel Beach Plage Noël

Riviera Beach  Alexander Oana owned Riviera Beach (Ste. Genevieve) May 22 , 1973

Plage Riviera/ Riviera beach link

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Roxboro (municipal) Beach was at 1st and 2nd Ave North  July 16, 1970 North Shore News
 and  "at the beach near 1st Avenue north" April 5 , 1973

Roxboro beachfront park 1965

Des Familles

Villagio Italiano at St Louis de Terrebonne ? not on the island?

Country Club

Oka Provincial Park Beach : Pointe Calumet beach: May not be considered a Montreal beach

Plage Jacob l'annonciation d'Oka
Cote Ste. Catherine Park
Oka Provincial park
Plage Richard, annonciation d'Oka

Laval Beach/Plage Lajeunesse   http://www.geodata.us/canada_names_maps/maps.php?featureid=EGWYH&f=144

Beach/Plage Chartrand (Laval) http://www.geodata.us/canada_names_maps/maps.php?featureid=EHRHZ&f=145  not a beach today, but it may been one long ago.

Ile Bizard Beach Technically not on the Island of Montreal ...
article http://blogs.montrealgazette.com/2010/07/08/ile-bizard-beach-ferry-to-laval-offer-respite-from-the-heat/

Ile Bizard : Martin Beach/Plage Martin a little west of the above photo.

"El Rancho" Beach in Laval West  montreal gazette aug 15, 1968 and aug 29 , 1973
 Riviere des Mille Iles / Back River

Beach/Plage Bissonnette

http://www.bing.com/maps/?v=2&cp=rmgrb28w8zrf&lvl=18.2&dir=1.57&sty=b&where1=Montr%C3%A9al-Est%2C%20QC&form=LMLTCC