Gravel for a Chicken Run: Best Stone, Depth and Tons
Picking gravel for a chicken run is mostly about one thing: keeping the floor dry. Chickens scratch, dust-bathe and drop manure all day, and a bare-dirt run that turns to mud after every rain soon smells, draws flies and is hard on the birds’ feet. A layer of the right stone lets water drain down and away, gives the flock firm footing and makes the run easier to clean. This guide covers which stones work, which ones to skip, how deep to lay them, what to put on top and how to figure how many tons to order.
Open the gravel calculator →The short answer
- Base: 3 to 4 inches of clean, washed stone with no fines, such as #57 or a similar 3/4-inch stone, for drainage. Use more on wet or clay ground.
- Top layer: 2 to 4 inches of something softer the birds can scratch in, such as coarse washed sand, pea gravel or wood chips.
- Pea gravel alone works in a small run if it drains well, but it shifts underfoot and manure settles into it.
- Skip fine stone dust and screenings as the only layer; they pack hard and can hold water on the surface.
- Tons = length × width × depth in inches ÷ 12 ÷ 27 × about 1.4 for most gravels.
Related: How Much Pea Gravel for a 10x10 Chicken Run?
Why put gravel in a chicken run?
Soil in a busy run gets scratched bare within weeks, and bare soil compacts into a surface that sheds water slowly. Gravel fixes that in three ways. It opens up space for water to soak down, it lifts the walking surface above the wettest layer, and it gives you something firm to rake and scrape. It will not fix a run built in the lowest corner of the yard, though, so the site and the drainage around it still matter more than the stone you pick.
Best gravel for a chicken run, compared
- #57 or 3/4-inch clean stone. Angular, washed stone with lots of open space between the pieces. It drains very well and locks in place, which makes it the best choice for the base layer. The sharp edges are less pleasant as a bare top surface, so cover it.
- Pea gravel. Small rounded stones that are easy on feet and drain well. It rolls and spreads, so it needs an edge to hold it in, and droppings work down between the stones, which makes cleaning slower. Read more in our guide to how much a yard of pea gravel weighs.
- River rock. Larger rounded stone. It drains, but it is awkward to walk and scratch on and hard to clean around. Better for a drainage strip outside the run than for the floor.
- Crusher run or dense-grade base. Stone mixed with fines that packs into a firm, almost paved surface. Good under a coop or a feed station where you want a hard pad, poor where you want water to soak through.
- Limestone screenings or stone dust. Packs hard and smooth. On its own it can hold a film of water and turn to paste, so use it only in thin layers, if at all.
Washed stone matters here. Unwashed gravel carries fines that fill the gaps and slow drainage; our page on washed vs unwashed gravel explains the difference.
Related: How Much Pea Gravel for a 10x12 Chicken Run?
What to put on top of the gravel
Most keepers who are happy with a gravel run use it as a drainage layer, not as the surface the birds live on. Common toppings are:
- Coarse washed sand. Drains through to the stone, dries fast and is easy to sift or rake. A coarse sand drains better than fine play sand. See mason sand vs concrete sand for how the grades differ.
- Wood chips or shavings. Soft, absorbent and good for scratching. They break down over time and need topping up or replacing.
- Pea gravel. A middle ground for keepers who want stone all the way up but a gentler surface than crushed stone.
Chickens will peck at small stones in the run. That is normal behavior, since birds use grit to grind their food, but it is not a substitute for a proper grit source if they need one.
How deep should gravel be in a chicken run?
- Well-drained ground: about 3 inches of clean stone plus 2 to 3 inches of topping.
- Clay or wet ground: 4 to 6 inches of clean stone, and consider a separation fabric under it so the stone does not sink into the mud. Our page on landscape fabric under gravel covers when that helps. Keep fabric well buried, because scratching birds will find it and pull it up.
- Run raised above the yard: if the run sits in a low spot, build the stone up with a border of timbers or blocks so the floor ends up above the ground around it.
How to lay gravel in a chicken run
- Move the birds out and scrape off old bedding and the top layer of manure-soaked soil.
- Shape the ground so it slopes gently away from the coop and toward a spot where water can leave the run.
- Deal with diggers. Gravel alone will not stop a digging predator. Many keepers bury hardware cloth along the fence line as an apron, or lay it under the whole run before the stone goes in.
- Add fabric if the soil is soft, then spread the clean stone and tamp or roll it firm.
- Spread the topping and rake it level, leaving it a little higher near the coop door where traffic is heaviest.
- Handle roof water. A gutter or a gravel strip at the drip line keeps the coop roof from dumping water into the run; our guide to drainage gravel around a foundation shows the same idea on a bigger building.
How much gravel do I need for a chicken run?
- Area (sq ft) = run length × run width.
- Volume (cu yd) = area × depth in inches ÷ 12 ÷ 27.
- Tons = cubic yards × about 1.4 for clean stone or pea gravel. Coarse sand is a little lighter, about 1.3 to 1.35 tons per cubic yard. Use your supplier’s number if they give one.
- Add 5 to 10 percent for settling and uneven ground.
Worked example: a 10 by 20 foot run is 200 square feet. A 4-inch clean stone base is 200 × 4 ÷ 12 = about 66.7 cubic feet, or about 2.5 cubic yards, which at 1.4 tons per yard is roughly 3.5 tons. A 2-inch layer of coarse sand on top is about 33.3 cubic feet, or about 1.2 cubic yards, roughly 1.6 to 1.7 tons. Run your own sizes in the gravel calculator and the sand calculator. If you plan to haul it yourself, our page on how much a 5-gallon bucket of gravel weighs helps you plan loads, and for small runs bagged stone may be simpler than a bulk delivery.
Keeping a gravel run clean
- Rake or sift droppings and old bedding off the top layer often; the stone base underneath should stay clean.
- Top up sand or chips as they wear thin or wash out.
- Every so often, replace the top layer completely and let the run dry out.
- Fix low spots that hold puddles before they spread.
Common mistakes
- Building the run in the lowest, wettest part of the yard and hoping gravel will fix it.
- Using stone with lots of fines, which packs and stops draining.
- Leaving sharp crushed stone as the only surface.
- Laying stone too thin, so it vanishes into the mud after one season.
- Counting on gravel to keep out predators that dig.
Questions people ask
What is the best gravel for a chicken run?
Clean, washed 3/4-inch stone such as #57 makes the best base because it drains well and stays put. Cover it with coarse sand, pea gravel or wood chips so the birds have a softer surface to walk and scratch on.
Is pea gravel good for a chicken run?
It can be. Pea gravel is smooth on feet and drains, but it shifts around and droppings settle between the stones. It works best as a top layer over a clean stone base, with an edge to hold it in.
How deep should gravel be in a chicken run?
About 3 inches of clean stone plus 2 to 3 inches of topping suits well-drained ground. On clay or wet ground, use 4 to 6 inches of stone and consider fabric underneath.
How much gravel do I need for a 10x20 chicken run?
A 4-inch base over 200 square feet is about 2.5 cubic yards, or roughly 3.5 tons at 1.4 tons per yard. Add 5 to 10 percent for settling.
Will gravel keep predators from digging into the run?
No. Digging animals can move gravel. Bury hardware cloth along the fence line as an apron, or lay it under the whole run before the stone goes in.
Should I put sand or gravel in a chicken run?
Many keepers use both: gravel underneath for drainage and coarse sand on top because it dries quickly and is easy to rake clean.
Related guides
- Gravel dog run: best stone, depth and drainage
- Pea gravel for a playground
- Landscape fabric under gravel
- How much a yard of gravel weighs
- How much a yard of gravel covers
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