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- Mackerel Cove Beach
- Mackinaw City Beach #1
- Mackinaw City Beach #2
- Mackinaw City Lighthouse Park
- Madaket
- Madeira Beach
- Madison Park Beach
- Mad River Beach County Park
- Madrona Park
- Magnolia Lane
- Magnolia (North)
- Magnolia (South)
- Magnuson Beach
- Magnuson Beach Off Leash Area
- Magnus Park
- Magoon Creek
- Magothy Manor
- Maguires Landing
- Maidstone Beach
- Maidstone Club, Inc.
- Main
- Main Beach
- Main Beach @ Boardwalk
- Main Beach Park
- Main Beach @ San Lorenzo River
- Main (Ogunquit)
- Main Street Beach
- Main Street Pier
- Malad River
- Malaga Cove
- Malden Launch Ramp
- Malfa Road
- Malheur River
- Malibu
- Malibu Surfrider Beach
- Manasota Key (Englewood Beach)
- Manatee Public Beach North
- Manchester State Park
- Mandos Cove - South of Drain
- Manhattan Avenue
- Manhattan Beach
- Manhattan Beach at 28th St storm drain
- Manhattan Beach at 40th Street
- Manhattan Beach at Dividing Creek
- Manhattan Beach at El Porto
- Manhattan Beach Pier
- Manhattan Beach State Park
- Manhem Beach Club
- Manistique Township Park
- Mannon C. Gore Bridge - Wildlife Ramp (S1B)
- Mann's Harbor Bridge (N68)
- Manorhaven Beach Park
- Manresa Beach
- Manteo Waterfront Park (N86)
- Manzanita
- Maple
- Marconi (National) 1
- Marconi (National) 2
- Marina Park Beach
- Marine City Beach
- Marine City Diving Area
- Marinelli (Jetty) Beach
- Marlboro Landing
- Marler Park
- Marquette Park Beach
- Marquette South Beach
- Martin Beach
- Martin Street (N85A)
- Marvin
- Mary Ann Nelson Beach, Mobile Bay
- Maryland
- Mashamoquet Brook State Park
- Mash Island
- Mashpee-Wakeby (Attaquin)
- Mashpee-Wakeby (Camp Farley)
- Maslowski
- Masonboro Island (S48)
- Mason's Beach
- Matheson Hammock Park
- Matthews Beach Park
- Mattituck Breakwater Beach
- Mattole Beach
- Matunuck Town Beach
- Maumee Bay (Erie)
- Maumee Bay (inland)
- Maxson
- Mayflower
- Mayo
- Mayo Beach Park
- Mayville Lakeside Park
- McCabe's Beach
- McCarty's Cove
- McCook Point
- McCoy Creek
- McFaddin NWR #1
- McFaddin NWR #2
- McFaddin NWR #3
- McFaddin NWR #4
- McFaddin NWR #5
- McFaddin NWR #6
- McGee Beach #1
- McGee Beach #2
- McGraw County Park
- McKinley Beach
- McNears Beach
- Meadow Run at Ohiopyle, PA
- Mears State Park
- Mecax (Mecox) Beach
- Medbury Park
- Medicine Lodge Creek
- Meeting House Pond
- Megansett Beach
- Meinert State Park
- Memorial Bayfield
- Memorial Beach
- Memorial Drive Wayside Middle
- Memorial Drive Wayside North
- Memorial Drive Wayside South
- Memorial Washburn
- Menauhant - East
- Menauhant - West
- Menemsha
- Merrick Estates Civic Association
- Meschutt Beach County Park
- Metcalf Road Beach
- Metropolitan Beach Metropark
- Mexico Point State Park
- Meydenbauer Beach Park
- Meyers
- Miacomet
- Miami
- Miami Beach
- Michekewis Beach
- Michiana Village
- Michigan
- Mickler's Landing
- Middle Beach (Biddeford)
- Middle Fork Boise River
- Middle River at Bald Rock
- Middle River at Cline River Road
- Middle River at Damtown
- Middle River at Franks Mill
- Middle River at Spring Hill Road
- Middle River at Weyers Cave Road
- Middle River Beach
- Middle Village Beach
- Midland Beach
- Mile Beach
- Mill Beach - Macklyn Creek near parking access
- Mill Creek
- Mill Creek
- Miller Beach
- Miller Beach
- Miller Beach Surf Club
- Miller Park
- Miller Place Park
- Millerton Point
- Mill Road
- Mill Road Beach
- Mills River in Pisgah National Forest
- Millway Beach
- Minam River
- Mingo
- Minnesota Point (15th Street Harbor Side)
- Minnesota Street Beach
- Minot
- Misquamicut Club
- Misquamicut Fire District Beach
- Misquamicut State Beach
- Missouri
- Mitchell College Beach
- Mitchell's Cove Beach
- Mohawk River at Waterford
- Mona Lake Park Beach
- Monmouth Beach Club
- Montana de Oro
- Monteith Park-Calapooia River
- Monterey Municipal Beach
- Monterey State Beach
- Montgomery
- Montgomery Blvd Beach
- Montrose Beach
- Monument Beach
- Monument Rd
- Moody (Ogunquit)
- Moolack
- Moonlight State Beach / Cottonwood Creek
- Moonstone Beach
- Moorings on the Magothy
- Moraine Dog Beach
- Moran Lake County Beach
- Morehead City Beach (C48C)
- Morgan Memorial Park Beach
- Morris Yacht and Beach Club
- Morro Bay City Beach (MB12)
- Morro Bay City Beach - North (MB13)
- Morro Rock (MB11)
- Moses Smith Creek
- Moshup
- Moss Point Beach
- Mothers Beach
- Mother's Beach Marina Del Rey
- Mound Street
- Mount
- Mountain Point at Gibson Island
- Mount Baker Park Beach
- Mount Tom State Park
- M Street Beach (@M Street)
- Muir Beach - Central
- Muir Beach - North
- Muir Beach - South
- Mukilteo Lighthouse Park
- Mumford Cove
- Murphy Park Beach
- Muskegon State Park
- Muskegon State Park Lake Side
- Muskegon State Park Shoreline Beach North
- Mussel Shoals Beach - North of Pier
- Mustang Island
- Mustang Island SP #1
- Mustang Island SP #2
- Mustang Island SP #3
- Mustang Island SP #4
- Mustang Island SP #6
- Myrtle Beach State Park
- Mystery Bay State Park