Free under CC-BY 4.0. Mirror it, build on it, ship products with it. We just ask for a citation back.
34 columns per row. Three families:
name, short_name, city, state, country — track identity and human-readable location.latitude, longitude — geocoded coordinates (centerline of facility).track_type — one of dirt_oval, kart, micro_sprint, quarter_midget.track_surface — clay / asphalt / mixed where known.iracing_id, osm_way_id — cross-references to iRacing and OpenStreetMap.shape, length_miles, track_size_ft — what most racers want to know first.banking_turns_deg, banking_straights_deg — degrees of bank, measured or estimated from satellite.width_turns_ft, width_front_ft, width_back_ft — racing surface width.turn_radius_12_ft, turn_radius_34_ft — turn 1/2 and turn 3/4 radii.track_perimeter_ft, track_area_sqft, track_aspect_ratio — derived from the OpenStreetMap polygon.clay_pct, sand_pct, silt_pct — racing surface composition where the promoter or surface team has shared it.substrate_taxsuborder — USDA SSURGO soil suborder (e.g. Ustolls, Aquolls) for the underlying parent material.substrate_drainage — USDA drainage class.substrate_awc_inches — available water capacity per inch of soil.substrate_ksat_umsec — saturated hydraulic conductivity in micrometers/second.| Country | Tracks | Top regions |
|---|---|---|
| United States | 652 | TX (47), IA (42), PA (36), CA (28), MO (28) |
| Canada | 44 | ON, QC, AB, SK, NS |
| Australia | 8 | NSW, VIC, QLD |
| United Kingdom | 6 | England, Scotland |
| New Zealand | 4 | North + South Island |
| South Africa | 2 | Gauteng, KZN |
Most of the rows started life as our internal track registry for The Black Book — the AI crew chief app at racer.wiki — and were then enriched with three external data layers:
Confidence varies. data_confidence and geometry_confidence are not in this public export; if a value looks shaky, the OSM polygon or the USGS soil map almost always has the authoritative source.
You may share, remix, build commercial products on top of this data. The only requirement is attribution.
Suggested citation:
The dataset will be re-published quarterly. Material changes between releases will be posted at /datasets/dirt-tracks/changelog and announced in /llms.txt for AI crawlers.
Grassroots dirt-track racing has been operating without a public database for as long as the sport has existed. Promoters' contact info lives on Facebook event pages. Track geometry lives in the heads of three or four old guys per region. Surface science lives nowhere — every promoter learns the same lessons over again with a shovel and a moisture meter.
Releasing this data is the cheapest, most permanent contribution we can make to the sport. If a single university researcher uses it for a thesis, a single race team uses it to plan a tour, or a single new track owner uses it to sanity-check their geometry, we win.
Found something wrong? Know a track we missed? Email dataset@racer.wiki with the track name, country, and what we got wrong. We process corrections weekly.