Do you deliver to Boulder County?

Yes. Colorado Rock Supply delivers bulk gravel, stone, sand, and soil across Boulder County. That includes the mountain communities like Allenspark, Nederland, and Ward as well as the front range cities like Boulder, Longmont, and Lafayette. Order online, size your load with the calculator, and we will schedule the delivery.

What is the difference between crushed stone and Natural Pea Gravel?

Crushed stone is angular rock that locks together when compacted, which makes it a good base or drainage layer. Natural Pea Gravel is round and smooth, so it stays loose and moves underfoot. Use crushed stone where you need a stable surface, and Natural Pea Gravel for play areas, pipe bedding, or as xeriscape mulch where you want a softer feel.

Should I order material by the ton or by the yard?

Either unit works, and the calculator on each product page converts between them. A yard is a volume measure, and a ton is a weight measure. Dense materials like road base weigh more per yard than light ones like mulch. The calculator takes the guesswork out, so you order the right amount for your project the first time.

Boulder County Class 6 Road Base and Gravel Delivery, CO

Colorado Rock Supply provides gravel, stone and aggregate delivery in Boulder County, Colorado to a mix of contractors and homeowners. Ask a local contractor what base they order for a driveway and the answer is almost always Class 6 road base. We weigh options with you before recommending the right material for your project.

The ground here works against you if you skip the base. Expansive bentonite clay is common along the Front Range and moves with moisture, so base depth and drainage matter more than in stable soils. Spring snowmelt and short, intense summer thunderstorms send water where it can do damage if the surface is not graded and compacted correctly.

Materials Delivered in Boulder County

Local names matter when you order aggregate in Colorado. A contractor from another state might ask for "pathway gravel" or "sand for bedding," but the terms used here are different. Use the names below when you order, and each links to the product page for more detail.

Class 6 road base also goes by Class 6. It is a crushed aggregate with fines that lock together when compacted, creating a firm surface that holds up under vehicles. Most driveways, parking pads, and shed or garage bases in Boulder County start with a layer of Class 6. For heavier structural base under drives that carry trucks or equipment, order Class 5 base course instead.

Ground Conditions Across Boulder County

Water is the main force shaping how you build here. Spring snowmelt and short, intense summer thunderstorms send runoff across the surface and into the ground. A driveway built on 4 inches of base over clay will shift; one built on 6 to 8 inches with proper drainage will not.

Runoff on slopes and in drainage swales after snowmelt and monsoon-season storms can scour the soil fast. That is where rip rap and cobble are used to armor the bank and slow the water. Repeated freeze-thaw cycling, often several cycles in a single week at altitude, also heaves the ground. Frost depth runs about 30 to 36 inches in much of the state, so footings and posts need to sit below that line.

Timing your project matters too. Base and drainage work runs best from late spring through fall; frozen ground and snowpack limit compaction in winter at altitude. Plan to finish your base and compaction before the ground freezes.

Delivery Across Boulder County

Ordering is done online, and the first step is sizing your load. You can order by the ton or by the yard, and the calculator on each product page helps you convert your project dimensions into a quantity. Have your measurements ready before you order.

Bulk material arrives by dump truck, and you will need a spot for the driver to spread it or a place to pile it. Think about access before the truck arrives. We deliver to Allenspark, Boulder, Eldorado Springs, Hygiene, Jamestown, Lafayette, Longmont, Louisville, Lyons, Nederland, Niwot, Pinecliffe, and Ward, covering the full county from the plains to the mountains.

Choosing the Right Material

The right base and drainage material shifts across Colorado depending on where you build. Comparing a few regions shows why.

In Boulder County, the clay and freeze-thaw cycle push you toward a full Class 6 base and good drainage. Do not skip the base to save a step; it is what keeps your driveway or pad stable through the wet and freeze cycles.

Order Gravel and Aggregate for Your Boulder County Project

From Class 6 road base for a new driveway to crusher fines for a trail or rip rap for a drainage swale, the right material starts with the right base and drainage plan. Boulder County projects run from late spring through fall, so get your measurements ready and order online. Colorado Rock Supply will deliver the material you need, sized correctly, to your site.

Class 6 Road Base, Sand and Gravel Delivery in Boulder County, CO