Fill Dirt vs River Rock
Side-by-side comparison of Fill Dirt and River Rock to help you choose the right gravel for your project.
Overview
Subsoil material free of organic matter, used for grading, filling, and raising elevation. Fill dirt is a lower-grade soil that lacks the nutrients of topsoil, making it ideal for structural and non-growing applications where settling must be minimized.
Naturally rounded stones smoothed by water erosion. Available in sizes from 1 to 5+ inches. River rock adds a polished, natural look to any landscape and is prized for its smooth texture and visual appeal.
Common Uses
Fill Dirt
- ✓ Grading
- ✓ Filling depressions
- ✓ Raising elevation
- ✓ Backfill
- ✓ Construction site prep
- ✓ Under slabs
River Rock
- ✓ Landscaping
- ✓ Dry creek beds
- ✓ Drainage
- ✓ Decorative borders
- ✓ Erosion control
- ✓ Pond and water features
Pros & Cons
Fill Dirt
- + Very affordable — often cheapest material available
- + Compacts firmly for structural support
- + Does not decompose or settle like organic soil
- + Widely available from construction sites
- + Ideal base under gravel or concrete
- − Not suitable for growing plants
- − Must be free of debris and contaminants
- − May contain clay that drains poorly
- − Needs compaction in layers for stability
- − Quality varies widely between sources
River Rock
- + Beautiful, natural appearance
- + Extremely durable and long-lasting
- + Heavy enough to resist displacement
- + No sharp edges
- + Low maintenance
- − More expensive than crushed stone
- − Heavy and difficult to move
- − Not suitable for walking surfaces
- − Cannot be compacted
- − Limited use for structural applications
Cost Comparison
| Measure | Fill Dirt | River Rock |
|---|---|---|
| Per ton | $5 – $15 | $40 – $100 |
| Per cubic yard | $8 – $25 | $45 – $120 |
Sizes & Colors
Fill Dirt
Fine to coarse soil particles, free of organic matter like roots, grass, or leaves. Color ranges from tan to reddish-brown depending on local geology. "Clean fill" means free of debris, rocks larger than 3", and contaminants.
River Rock
River rock comes in a wide range of sizes: small (1"–2"), medium (2"–3"), large (3"–5"), and boulders (5"+). Natural colors include gray, brown, tan, white, black, and multi-colored blends. Mexican beach pebbles offer polished black and gray options.
Published February 11, 2026
Compare prices from local suppliers
Get quotes from gravel suppliers near you to find the best deal.