Enhance your landscape with authentic Napa Valley Basalt Rock Boulders, naturally formed volcanic stones known for their strength, durability, and warm Wine Country color tones. These boulders feature a natural blend of tan, golden beige, sandy brown, and weathered gray accents, giving outdoor spaces a premium Napa Valley aesthetic.
 
Available in multiple sizes—from decorative 18–36” accent boulders to massive 2-ton structural stones—these basalt boulders are ideal for retaining walls, hillside reinforcement, entry monuments, and decorative focal points.
 
Common Uses & Applications
Landscaping & Decorative
Stand-alone accent boulders
Front-yard and backyard focal points
Natural groupings for native or Mediterranean gardens
Landscape transitions and decorative borders
Feature stones for wineries, estates, and commercial properties
Retaining & Structural
Boulder retaining walls
Terraced hillside stabilization
Property boundary walls
Erosion control and slope reinforcement
Outdoor seating and natural wall structures
Water & Drainage Features
Waterfalls and pond edges
Dry creek beds
Riparian-style drainage channels
Vineyard, Ranch & Estate Enhancements
Entry monument stones
Driveway flanking boulders
Vineyard markers
Large commercial landscape accents
 
Material Specs & Technical Notes
Material Type - Basalt – dense, volcanic stone known for exceptional durability.
Color & Texture - Warm tan and golden beige base tones
Sandy-brown shading with subtle gray mineral veining
Rugged quarry surface with angular fractured faces
Natural texture ideal for Wine Country landscapes
 
Available Boulder Sizes
18–36" Boulders (~100–1,000 lbs. each)
½-Ton Boulders (~500–1,600 lbs. each)
1-Ton Boulders (~1,800–3,000 lbs. each)
2-Ton Boulders (~2,500–5,000 lbs. each)
 
Strength & Durability
Very high density and compressive strength
Weather-resistant and long-lasting
Suitable for load-bearing installations
Performs well in freeze-thaw environments
 
Installation Notes
Requires machinery for placement (skid-steer, mini-excavator, forklift)
For retaining walls: embed 20–30% of boulder height
Use compacted base layer and drainage gravel behind structural boulders
Interlock stones for maximum stability
 
Delivery Information
We deliver Napa Valley Basalt Boulders throughout the Bay Area and anywhere in Northern California using dump trucks.
 
Load Capacity
Maximum payload per truck: ~20-24 tons (based on truck access)
Mixed sizes allowed as long as total weight stays under the limit
 
Delivery Pricing
$150/hour round-trip for local dump truck delivery
Long-distance statewide delivery billed by zone or mileage
Final pricing provided on your quote
 
Dump Spot Requirements
Must be flat, safe, and accessible
Clear of overhead hazards (wires, branches, eaves)
No soft ground or steep slopes
Driver chooses dump location for safety
 
Preventing Pavement Damage
We strongly recommend spreading a few inches of dirt or sand on pavement before the dump. This prevents cracking or surface damage when dropping larger boulders.
 
Placement Policy
Dump delivery only
No crane or hand placement
Customer must provide equipment for moving boulders on-site
 
Scheduling
Most deliveries available same-day or next-day
Large orders (10–24 tons) may require 24–48 hours’ notice
Use quote request for volume orders or truck-load pricing discounts.
 
 
Frequently Asked Questions — Napa Valley Basalt Rock Boulders
Q1. What sizes do Napa Valley Basalt Boulders come in?
We offer four size categories:
18–36" Boulders (~100–1,000 lbs. each)
½-Ton Boulders (~500–1,600 lbs. each)
1-Ton Boulders (~1,800–3,000 lbs. each)
2-Ton Boulders (~2,500–5,000 lbs. each)
 
Q2. How many boulders can fit in one truckload?
Large transfer-dump trucks can haul up to 24 tons per load. The number of stones depends on size:
18–36" boulders: 30-50 pieces
½-Ton: approx. 20–40 pieces
1-Ton: approx. 20–30 pieces
2-Ton: approx. 10–15 pieces
 
Q3. Do you place boulders where I want them?
We offer dump delivery only. For placement, customers will need:
Skid-steer
Mini-excavator
Forklift
Or crane services (if needed)
 
Q4. Can boulders damage my driveway?
Large boulders can damage asphalt or concrete if dropped directly. We strongly recommend placing a few inches of dirt or sand on top of your driveway before delivery to protect the surface.