Mountain Gate Quarry delivers the highest-quality, pH-balanced limestone in Northern California—field-proven and CalTrans-approved for critical infrastructure like bridge and roadway construction. From large-scale civil projects to ag lime and home landscaping, our rock is tough on performance and easy on the environment. Builders, engineers, and homeowners across the state trust Bear Gulch for clean, consistent material that gets the job done right.
Compactable and loaded with fines, this rock forms a solid foundation for concrete, asphalt, or any large-scale project requiring a sturdy base.
1/4" Base Rock
A mix of sub-half-inch rocks and fines, ideal for roadways, building construction, slab fill, fence posts, stalls, and paths—offering a highly compactable, long-term foundation.
1/2" Base Rock
Our most popular product, this environmentally conscious limestone provides a lasting foundation for roads and other infrastructure projects.
3/4" Base Rock
Contains a blend of rocks under half an inch and fines, creating a highly compactable base suitable for projects demanding a solid foundation.
1-1/2" Base Rock
Rough aggregate designed to support pavement edges, prevent cracking, and minimize drop-off heights—essential for roadway durability.
3/4" Shoulder Backing
Clean, crushed stone without fines, suitable for construction projects requiring precise, clean rock.
1/4" Chip
Decorative limestone rock with no fines, perfect for construction or landscaping projects needing clean, aesthetically pleasing stone.
3/8" Chip
Ideal for laying pipes or slab fills, this bedding material ensures stability and support in pipe-laying or roadway construction projects.
3/4" Bedding
100% clean rock without fines, perfect for decorative projects requiring small-diameter landscaping rocks, such as flowerbeds and pathways.
1" Deco
Crushed limestone rock with no fines, suitable for leaching, septic systems, drainage projects, and decorative landscaping.
1-1/2" Deco/Leach
Three-inch crushed limestone without fines, ideal for creating robust construction entrances and heavy-duty applications.
3" Construction Gravel
Larger cobblestones commonly used in wall and roadway construction, as well as decorative projects requiring substantial rock presence.
3"x8" Cobble
Certified stones between 6 and 12 inches in diameter, meeting CalTrans Section 72, Method B, No. 1 specifications—essential for engineering applications.
6"x12" Engineer Stone
Used on banks and shores to create rock slopes into water bodies, serving as landscape accents or traffic barriers.
1'-2' Limestone Rip Rap
Unique limestone boulders are available in various sizes, perfect for commercial or residential landscaping projects seeking distinctive features.
Select Decorative Rip Rap
Limestone up to 3 inches in size, suitable as a base material for construction projects like driveways and roadway subgrades, meeting CalTrans Section 37 Specification.
3" Minus
Rock up to 8 inches in diameter, used as fill material in projects requiring large rocks for strength, containing fines for binding.
8" Minus
Contains imported/recycled material with fines and larger rocks, used as fill dirt for strength and binding in various applications.
8" Recycle Fill
Large riprap stones used on banks and shores for creating rock slopes into water, also serving as landscape accents or traffic barriers.
2'-4' Limestone Rip Rap
A powerful soil additive that raises the pH of acidic soil, providing calcium and magnesium—ideal for home gardens, commercial farms, and industrial applications.
Agricultural Lime
Fill sand meeting PG&E specifications for backfill, used in trenching for electrical cables, conduits, or gas pipes, ensuring a solid earth foundation.
PG&E SandNot seeing the exact rock or size you need? Give us a call—we handle special orders and can check real-time availability to get you what your job demands.
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