How to tell if a road is paved before you ride it
Find out whether every stretch of your route is tar, gravel or dirt before you ride, and which surfaces suit your bike and tyres.
The short answer
Look up the road's surface tag in OpenStreetMap, then confirm it in satellite and street-level imagery. Paved roads look smooth and evenly coloured, often with painted lines; gravel shows pale, dusty edges and wheel ruts. Knowing how to tell if a road is paved matters most where the map is silent, because an unmapped surface could be anything.
Key takeaways
- OpenStreetMap's surface tag is the main open record of what a road is made of.
- Asphalt, concrete, paving stones and sett count as paved; compacted, gravel, dirt and sand don't.
- "Surface not mapped" means nobody recorded it, not that the road is gravel.
- Compacted gravel suits most bikes; loose gravel, sand and soft tracks need wide tyres.
Definitions
- Surface tag
- The label OpenStreetMap mappers add to a road to record what it is made of, such as asphalt, gravel or dirt.
- Tracktype
- OpenStreetMap's five-step scale, from grade1 (solid) to grade5 (soft), for how firm a track is.
- Sealed road
- A road with a bound surface such as asphalt, concrete or chipseal; Australia and New Zealand call the rest unsealed.
How can you tell if a road is paved?
Check what the map says, then check what the road looks like. Here is how to tell if a road is paved: read the surface tag that OpenStreetMap mappers have recorded, then confirm it in satellite and street-level imagery. Where both are missing, ask someone who has ridden it.
Surface is one of the checks in planning a cycling route. It decides your speed, your puncture risk and which bike you bring. The same road can be smooth tar in one country and a dirt track over the border, so a line on a map is not enough.
Where does road surface data come from?
Almost all open road-surface data comes from OpenStreetMap, the free map of the world's roads built by volunteers. Many route planners draw on it.
Each road can carry a surface tag, such as surface=asphalt or surface=gravel. Tagging is voluntary, and the OpenStreetMap wiki says there are no default values. The one exception it gives is motorways, which can safely be assumed to be paved.
How complete is it? The wiki gives no worldwide figure, and we won't invent one. It depends on whether a local mapper has recorded each road.
Two more tags help on rough roads. Tracktype grades a track from grade1 (solid) to grade5 (soft); the wiki says around 96% of its uses are on tracks. Smoothness rates roughness from excellent to impassable, by the vehicles that can use it.
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What do OpenStreetMap's surface values mean on a bike?
The value tells you what to expect, not exactly how it rides. Definitions are paraphrased from the OpenStreetMap wiki; the last column is our guidance.
| Value | Paved? | What it is | On a bike |
|---|---|---|---|
| asphalt | Yes | Stone bound with bitumen (tarmac) | Fastest; any bike |
| chipseal | Yes | Fine gravel pressed into tar | Rougher than asphalt |
| concrete | Yes | Cement slabs or one surface | Fast; thumps at joints |
| paving_stones | Yes | Smooth artificial blocks | Fine; slippery when wet |
| sett | Yes | Cut stones, roughly flat tops | Bumpy; slippery when wet |
| compacted | No | Mixed stone pressed firm | Most bikes, slower than tar |
| fine_gravel | No | Fine loose gravel | Wider tyres; can be soft |
| gravel | No | Big loose stones to firm surface | Check imagery: wide range |
| unpaved | No | Unsealed, chippings to soil | Unknown detail; check it |
| dirt | No | Exposed soil (earth) | Good dry, sticky when wet |
| ground | No | No surface, just worn by use | Often a path, not a road |
| sand | No | Rock under 2 mm (0.08 in) | Very slow; wide tyres |
Read the exact value, not only paved or unpaved. An all-"paved" route can still include long cobbled stretches, as riders on Belgium's cobbled climbs know.
How do you check a road's surface in imagery?
Satellite imagery shows colour and texture; street-level imagery shows the road itself. Use both wherever the tag is missing or the road looks minor.
From above, look for:
- Painted lines: almost always a sealed road.
- Colour: asphalt is dark grey; gravel and dirt are pale or the colour of the soil.
- Edges: sealed roads have sharp edges; gravel fades into the verge.
- Wheel ruts or a grass strip down the middle: an unsealed track.
Street-level imagery, from Google Street View or Mapillary (crowdsourced, free to view), shows potholes and corrugations up close. Mapillary often covers back roads the big services miss. Check the date, because roads get sealed, or washed out. Ride reports and local bike shops fill the remaining gaps.
What does "surface not mapped" mean?
It means nobody has recorded the surface for that road in OpenStreetMap. It does not mean gravel, and it does not mean tar.
Untagged stretches are common on minor roads, new roads and places with few mappers. List them with their distances and check each in imagery, the way our guide to checking a cycling route handles gaps and closures. If you ride one, add its surface to OpenStreetMap afterwards.
Which gravel grades can your bike ride?
Firm gravel suits most bikes; soft tracks suit wide tyres or nobody. OpenStreetMap's tracktype scale is the best guide to how firm a track is.
| Grade | OpenStreetMap description | Road bike | Gravel bike | Loaded touring bike |
|---|---|---|---|---|
| grade1 | Solid; usually paved | Fine | Fine | Fine |
| grade2 | Mostly solid gravel with sand and clay | Slow; punctures | Fine | Fine, slower |
| grade3 | Even mix of hard and soft | Avoid | Rideable | Slow; worse wet |
| grade4 | Mostly soft: soil, sand or grass | No | Hard work | Expect to push |
| grade5 | Soft, uncompacted | No | Dry only | Push or reroute |
Rain moves every unpaved grade down the table. Loaded bikes sink deeper, so plan shorter days on rough tracks.
The examples run worldwide. Much of the Great Divide Mountain Bike Route in North America is unpaved. Iceland's F-roads are unsealed mountain roads, many of Namibia's minor roads are gravel, and Australian signs say "unsealed".
What are the common mistakes?
Most surface surprises come from trusting one source:
- Reading no tag as tar. An untagged road is unknown.
- Trusting "gravel" to mean one thing. It covers firm roads and loose, stony ones.
- Using old imagery. Check the date.
- Ignoring the weather. Dirt tracks change after rain.
Before your next ride, list every stretch that isn't asphalt or concrete, check each in imagery, and decide whether your bike and tyres suit it.
Frequently asked questions
Is chipseal a paved road?
Yes. Chipseal is fine gravel pressed into a layer of hot tar or bitumen, so OpenStreetMap counts it as paved. It is rougher and slower than smooth asphalt, and new chipseal can leave loose stones on top. The OpenStreetMap wiki notes it is popular on rural roads in many US counties.
What does unsealed road mean in Australia?
An unsealed road has no bound surface: it is gravel, crushed rock or dirt. Australians and New Zealanders say sealed and unsealed where Britons say tarmac and gravel, and New Zealanders often call gravel roads metal roads. Unsealed means the same as unpaved, so plan for slower riding, dust and corrugations.
Can you ride a road bike on a gravel road?
Usually, on short stretches of firm, compacted gravel, if you slow down and pick your line. Narrow, high-pressure tyres puncture more easily on sharp stones and skid on loose gravel, especially on descents. For long sections, loose surfaces or sand, a gravel or touring bike with wider tyres is safer and faster.
How do you add a missing road surface to OpenStreetMap?
Create a free OpenStreetMap account, open the road in the map editor and add a surface tag, such as surface=asphalt or surface=gravel, based on what you saw. The best time is just after you have ridden it. The next rider, and every route planner that uses OpenStreetMap, then benefits.
Do cobbles count as paved for cycling?
Yes. OpenStreetMap lists sett (cut stone with a roughly flat top) and unhewn cobblestone (rounded, uncut stone) as paved, but both ride very differently from asphalt. The famous cobbled sectors of Paris–Roubaix in northern France are sett. Cobbles shake a bike hard and turn slippery when wet, so check the exact value.
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Make a free ride page →Sources and method
- OpenStreetMap Wiki (2026). Key:surface
- OpenStreetMap Wiki (2026). Key:tracktype
- OpenStreetMap Wiki (2026). Key:smoothness
- OpenStreetMap Wiki (2026). Tag:surface=chipseal
- Mapillary (2026). Mapillary street-level imagery
Surface, tracktype, smoothness and chipseal definitions are from the OpenStreetMap wiki, read on 11 October 2026 and paraphrased. The wiki gives no figure for how much of the world's road network has a surface tag, so we don't quote one. The share of tracktype tags on highway=track (around 96%) is the wiki's own figure. The "on a bike" columns in both tables are editorial guidance, not measurements. Fly the route's 100 m (330 ft) check interval is from Windline's help centre (windline.tech/support/fly-the-route/).
About the author
Wes Thomson, Founder, Windline. Wes Thomson builds Windline, live wind and weather forecasts timed to when riders reach each stretch of road. He built it for his own 2,093 km tour from Pont Drift to Cape Town, and writes these guides with the same focus: what the wind will do to your ride, and how to plan around it.