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River Rock and Cobbles


Rock Mountain Products is your King County Garden Center and retail nursery.

Check out our extensive river rock and cobbles product line below:

Black Granite River Cobble

Available Sizing:

  • Fist to head size ~ random shapes

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Lightning Creek Cobbles

Available Sizing:

  • 1"-3" Skippers
  • 6" 'Small Loaf' Ledge Stone
  • 3" - 8" Random Shape and Sizes
  • 5" - 10"
  • Dry Stack

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Montana Blackberry Cobbles

Available Sizes:

  • Cobbles (1/2 - 1 man)

Additional Sizes: Montana Blackberry Landscape Boulders

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Montana Glacier Cobbles

Available Sizes:

  • 4" x 6"
  • 6" x 12"

Additional Sizes: Montana Glacier Boulders

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Montana Lichen Cobbles

Available Sizes:

  • Montana Lichen Cobbles 6" x 12" Cobbles (1/2 - 3/4 man)

Additional Sizes: Montana Lichen Boulders (1- 3 man)

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Montana Rainbow Cobbles

Available Sizes:

  • 3" x 6"
  • 4" x 9" Landscape

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