River Rock: Size, Uses, and Cost Per Ton (2026)

River rock is naturally rounded stone from river beds and glacial gravel deposits, washed and screened into size bands from 3/4 inch to 8 inches. It costs $40 to $100 per ton in 2026, weighs 1.35 to 1.6 tons per cubic yard, and is the go-to decorative stone for dry creek beds, garden beds, borders, and drainage swales where the rock needs to look good and stay put. It costs two to three times what crushed stone costs because it is sorted and washed, and because the supply is limited to places with river gravel.

River Rock Sizes and Where Each One Fits

• 3/4 to 1 inch. Ground cover in beds, between pavers, and around foundations. Close to large pea gravel and just as prone to rolling.
• 1 to 2 inch (egg rock). The most popular size. Bed mulch, dry creek beds, drainage around downspouts, and borders. Big enough not to scatter, small enough to shovel.
• 2 to 3 inch. Dry creek beds and swales that move real water. Stays put in a heavy rain.
• 3 to 5 inch. Creek bed edges, accent stone, and erosion control on gentle slopes.
• 5 to 8 inch cobbles. Set by hand as creek bed banks, water feature edging, and retaining stone.

What River Rock Is Used For

• Dry creek beds. A shallow swale lined with fabric, filled with 1 to 3 inch rock, and edged with larger cobbles. Moves runoff and looks like a stream bed. The single most common river rock project.
• Garden beds and ground cover. Two to 3 inches over fabric. Does not decompose like mulch, so it never needs replacing, but it does not feed the soil either.
• Downspout and drainage outlets. A splash pad of 1 to 2 inch rock stops erosion where water hits the ground.
• Foundation perimeters. Keeps soil from splashing on siding and discourages pests.
• Borders and edging. Around trees, along walks, and against fences.
• Water features. Pond edges, stream beds, and fountain basins.
• Xeriscape. Rock instead of lawn in dry climates.

How River Rock Behaves

Rounded stone does not lock together, so river rock never packs. That makes it a poor path or driveway surface and a great drainage stone: water runs through it fast and it rarely clogs. Large sizes stay where you put them by weight alone. Small sizes (3/4 to 1 inch) roll around like pea gravel and need edging.

River rock holds heat in full sun and can cook nearby plants in hot climates, and it makes weeding harder because you cannot hoe through it. Leaves and debris that fall into it are a pain to blow out. In exchange, it lasts forever and looks better with age.

Installing River Rock

Kill or remove weeds, grade the area, and lay a heavy landscape fabric; skipping the fabric means the rock sinks into the soil and weeds come up through it within a year. Spread 2 to 3 inches for ground cover. For a dry creek bed, dig a shallow channel 6 to 12 inches deep, line it with fabric, fill with 2 to 3 inch rock, and set 4 to 8 inch cobbles along the edges and in the bends. Larger rock is set by hand. River rock is heavy and awkward to shovel, so plan on a wheelbarrow and a strong back or a skid steer.

What River Rock Costs

Bulk river rock runs $40 to $100 per ton, or $45 to $120 per cubic yard. Sorted single-color rock (all white, all black, all gray) runs $100 to $250 per ton. One ton of 1 to 2 inch rock covers about 100 square feet at 2 inches. A 10-ton truckload runs $400 to $1,000 before delivery, which is double what the same load of #57 gravel costs. Bagged river rock at home centers is $5 to $9 per half-cubic-foot bag, or 8 to 12 times the bulk price, so only bag it for a planter or a tiny accent.

Because river rock is expensive and heavy, measure carefully before ordering. The planner below computes tons from a satellite photo of the area.

What to Avoid

Do not use river rock as a driveway, walkway, or patio surface; it rolls and you will hate walking on it. Do not put it under pavers or in a base layer. Do not use small river rock on slopes. Do not lay it directly on soil without fabric. And do not use it inside a French drain if a cheaper clean crushed stone is available; #57 does the same job for half the price. For the side by side with the cheaper rounded option, read pea gravel vs river rock.