Mt. Gaines Rock

Mt. Gaines Rock Mt Gaines Rock is a Gravel Plant that offers 3/4 inch gravel, Road Base (a mix of 3/4 inch gravel and fines), sand, and fill dirt.
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We also offer ornamental rock and specialize in quartz common to Mariposa County. We are also a historic Gold Mine!

The road to the “beach” sand is ready. Please contact us for all your sand needs!
08/27/2026

The road to the “beach” sand is ready. Please contact us for all your sand needs!

A Friend of Mt Gaines was gracious enough to fly over the plant and send us this image! Pretty cool how it shows all the...
08/25/2026

A Friend of Mt Gaines was gracious enough to fly over the plant and send us this image! Pretty cool how it shows all the rock and sand we are processing and selling.

Need Sand? Check out our beautiful white sand available for purchase now. $20 per ton for 1 dumptruck load or more. $40 ...
08/19/2026

Need Sand? Check out our beautiful white sand available for purchase now. $20 per ton for 1 dumptruck load or more. $40 per ton for small batches.

As another sun sets at Mt Gaines, we would like to thank our Partners, our Community, our Customers, and most important ...
08/12/2026

As another sun sets at Mt Gaines, we would like to thank our Partners, our Community, our Customers, and most important God for all His blessings.

08/04/2026
Another satisfied Mt Gaines Rock customer! Our road base product is a great option for dirt roads that lack a solid foun...
08/04/2026

Another satisfied Mt Gaines Rock customer! Our road base product is a great option for dirt roads that lack a solid foundation. The fines and 3/4 inch gravel bind together to create an impervious base. This option is great for people who do not want to have major issues with their roads or driveways in the winter. The base product also prevents the “spinning tire” effect because the aggregate sets up quickly to avoid loose gravel. To keep dust down, many customer also overlay their base with our 3/4 inch gravel.

Come and get it!!! We are now selling out of this premium crushed 3/4 inch rock as fast as we can make it! If you are lo...
07/27/2026

Come and get it!!! We are now selling out of this premium crushed 3/4 inch rock as fast as we can make it! If you are looking to make your property shine you can’t beat this beautiful blue/while rock that is great for overlaying dull brown rock or even raw dirt. Mt Gaines rock is crushed so the rocks jagged edges naturally fit together, creating a hard surface that will serve you and your property well for years to come!

07/04/2026

Happy 250th America!!! Mt Gaines Rock is proud to sponsor Mariposa County’s historic 4th of July celebration today, the 250th year of freedom for our country!!!! Here’s a video to show what freedom makes possible.

07/02/2026

After a lot of hard work by many people, Mt Gaines Rock is proud to announce our JAW CRUSHER is operational and crushing large boulders down to size. These large rocks yield a great 3/4 inch gravel product after crushing, conveying, screening, and ultimately lifting into a truck for transportation to job sites all over beautiful Mariposa county and beyond!

Here is the 3/4 inch crushed rock you all have been waiting for!!! White in texture with blue tones. Made from some of t...
05/19/2026

Here is the 3/4 inch crushed rock you all have been waiting for!!! White in texture with blue tones. Made from some of the hardest rock in Mariposa county! Great for driveways, paths, roadways and many other uses. Our rock is also on display at the fairgrounds so call us if you’d like to order some today!

Address

7176 Mt Gaines Road
Mariposa, CA
95338

Opening Hours

Monday 7am - 2pm
Tuesday 7am - 2pm
Wednesday 7am - 2pm
Thursday 7am - 2pm
Friday 7am - 2pm

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