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US road courses compared

Which of these courses is longest?

Road America is the longest of these 20 outlines at 4.048 mi (6.515 km). Lime Rock is the shortest verified outline at 1.474 mi (2.372 km).

The table shows published layout figures. Where a TrackOutline sticker outline differs, the note says so. A blank cell reads Not published.

Download the CSV. Its sticker_length_mi column is our measurement of each sticker outline, not a published figure.

Twenty US road courses on TrackOutline stickers
TrackStateLengthLength (km)TurnsDirectionOpenedMajor series
SebringFLWikipedia3.74 miWikipedia lists the current GP course at 3.741 mi.IMSA 12 Hours supplementary regulations, 20266.019 kmWikipedia pairs 6.019 km with 3.741 mi. 3.74 mi converts to 6.019 km.Wikipedia17IMSA 12 Hours supplementary regulations, 2026, WikipediaClockwiseIMSA 12 Hours supplementary regulations, 2026December 31, 1950WikipediaIMSA 12 Hours of Sebring, Trans-AmWikipedia
COTATXWikipedia3.426 miCOTA's 2026 USGP media kit says 3.41 mi. IMSA's 14 Oct 2026 supplementary regulations say 3.4 miles.Wikipedia5.513 kmWikipedia20WikipediaCounter-clockwiseWikipedia, COTA 2026 USGP media kitOctober 21, 2012WikipediaFormula 1, MotoGP, NASCAR, FIA World Endurance ChampionshipCOTA 2026 USGP media kit, Wikipedia
VIRVAWikipedia3.27 miIMSA VIR supplementary regulations, 2026, Wikipedia5.262 kmThe Wikipedia infobox lists 5.262 km. One sentence in the article lists the Full Course at 5.263 km.Wikipedia17IMSA VIR supplementary regulations, 2026, WikipediaClockwiseIMSA VIR supplementary regulations, 2026August 3, 1957Wikipedia also lists a reopening in March 2000.WikipediaIMSA, MotoAmerica, Trans-AmWikipedia
Road AtlantaGAWikipedia2.54 miIMSA Petit Le Mans supplementary regulations, 2026, Wikipedia4.088 kmWikipedia12IMSA Petit Le Mans supplementary regulations, 2026, WikipediaClockwiseIMSA Petit Le Mans supplementary regulations, 2026September 13, 1970WikipediaIMSA Petit Le Mans, MotoAmerica, Trans-AmWikipedia
Watkins GlenNYWikipedia3.45 miIMSA's 2026 Six Hours supplementary regulations say 3.4 miles. The IndyCar racetrack list says 3.370 mi.Wikipedia5.552 kmWikipedia11WikipediaClockwiseIMSA Watkins Glen supplementary regulations, 20261956Wikipedia dates the permanent circuit to 1956.WikipediaNASCAR Cup, IMSAWikipedia
Laguna SecaCAWikipedia2.238 miWikipedia, IMSA Laguna Seca supplementary regulations, 20263.602 kmWikipedia11Wikipedia, IMSA Laguna Seca supplementary regulations, 2026Counter-clockwiseIMSA Laguna Seca supplementary regulations, 2026, Wikipedia IndyCar racetracksNovember 9, 1957WikipediaIndyCar, IMSA, MotoAmericaWikipedia
Road AmericaWIWikipedia4.048 miWikipedia, Wikipedia IndyCar racetracks6.515 kmWikipedia14WikipediaClockwiseIMSA Road America supplementary regulations, 2026, Wikipedia IndyCar racetracksSeptember 10, 1955WikipediaIndyCar, IMSA, GT World Challenge America, MotoAmerica, Trans-AmWikipedia
Mid-OhioOHWikipedia2.258 miWikipedia, Wikipedia IndyCar racetracks3.634 kmWikipedia13Wikipedia's lead sentence describes the original 2.40 mi course as 15 turns. The current layout in the infobox is 13.WikipediaClockwiseWikipedia IndyCar racetracks1962WikipediaIndyCar, IMSA Michelin Pilot Challenge, MotoAmericaWikipedia, IMSA Michelin Pilot Challenge 2026 schedule
BarberALWikipedia2.38 miWikipedia, Wikipedia IndyCar racetracks3.830 kmWikipedia15WikipediaClockwiseWikipedia IndyCar racetracks2003WikipediaIndyCar, MotoAmericaWikipedia
Daytona roadFLWikipedia3.56 miWikipedia, IMSA Rolex 24 supplementary regulations, 20265.729 kmWikipedia12WikipediaCounter-clockwiseIMSA Rolex 24 supplementary regulations, 2026February 22, 1959Wikipedia lists the current sports car course from 1985.WikipediaIMSA Rolex 24 on this course. NASCAR Cup on the tri-oval.Wikipedia
RoeblingGAWikipedia2.02 miWikipedia, Roebling Road Raceway3.25 kmWikipedia9Roebling Road RacewayNot published1959WikipediaNot published
PalmerMAWikipedia2.3 miPalmer track information, Wikipedia3.7 kmWikipedia14Palmer track information, WikipediaEither wayPalmer track informationMay 2015WikipediaNot publishedNo current national series was named on the Wikipedia page or the track information page.
CMPSCWikipedia2.279 miFull circuit.Wikipedia3.668 kmWikipedia14WikipediaNot publishedJuly 1999WikipediaUSF Juniors, Atlantic ChampionshipWikipedia
ButtonwillowCAWikipedia3.000 miTrackOutline sticker outline: 2.68 mi (our measurement, not a published figure).Wikipedia4.828 kmWikipedia23Race #13 CW.WikipediaEither way, except the CircuitButtonwillow track info1995WikipediaNot published
ThunderhillCAWikipedia2.866 miEast circuit on Wikipedia. The track site calls the East track a 3-mile course.Wikipedia, Thunderhill Raceway Park4.612 kmWikipedia16Wikipedia lists 16 turns on the East circuit. The track site says 15 turns.Wikipedia, Thunderhill Raceway ParkNot publishedOctober 1993Wikipedia says the East course reached 2.866 mi in late 1997.WikipediaNot publishedFormer: 25 Hours of Thunderhill, 1998 to 2023.Wikipedia
Willow SpringsCAWikipedia2.5 miBig Willow.Wikipedia4.023 kmWikipedia9WikipediaNot publishedNovember 23, 1953WikipediaNot published
Lime RockCTWikipedia1.474 miWikipedia says IMSA gives the track as 1.474 mi (2.372 km). The infobox still lists 1.530 mi (2.462 km). The article says a 2008 measure came out near 1.500 mi. Lime Rock calls it a 1.5-mile course.Wikipedia, Lime Rock Park: facility overview2.372 kmWikipedia7Classic layout. Lime Rock lists seven-, eight- and nine-turn layouts. Wikipedia lists 8, 9 and 10-turn options.Wikipedia, Lime Rock Park: facility overviewNot publishedWikipedia says the classic layout has one left-hand turn. It does not say clockwise or counter-clockwise.April 1957Wikipedia gives both April 27 and April 28, 1957. Lime Rock says it opened in the spring of 1957.Wikipedia, Lime Rock Park: historyTrans-Am, NASCAR TruckWikipedia
NJMP ThunderboltNJWikipedia2.25 miThunderbolt.Wikipedia3.621 kmWikipedia13WikipediaNot publishedAugust 31, 2008WikipediaMotoAmericaWikipedia
SonomaCAWikipedia2.52 miLong circuit. The IndyCar racetrack list says 2.385 mi.Wikipedia4.056 kmWikipedia12WikipediaNot publishedThat IndyCar listing is 2.385 mi, not the 2.52 mi long course.Wikipedia IndyCar racetracksMarch 28, 1969Wikipedia dates the road course to March 28, 1969. The dragstrip opened March 8, 1969.WikipediaNASCAR CupWikipedia
Homestead roadFLWikipedia2.210 miWikipedia lists the road course at 2.210 mi (3.556 km) and 13 turns. TrackOutline sticker outline: 2.18 mi, following the Wikimedia Commons map of this layout, which gives 2.18 mi and numbers 15 corners.Wikipedia, Wikimedia Commons main road course map3.556 kmWikipedia13WikipediaNot publishedNovember 3, 1995Wikidata lists the opening as November 5, 1995.WikipediaNASCAR Cup on the oval.Former: Formula E, 2025.Wikipedia

Buy an outline

Each course in the table is a 4 inch sticker. One sticker is about $12.28 with US shipping. The five-pack ships free, $6.60 a sticker.

A five-pack is five copies of one outline. Build your 5-pack to mix tracks.

Common questions

Which US road course on this list is the longest?

Road America, at 4.048 mi (6.515 km). Sebring is next at 3.74 mi.

Which course is the shortest?

Lime Rock, at 1.474 mi (2.372 km). Roebling is next at 2.02 mi.

Which course has the most turns?

Buttonwillow, with 23 turns on its Race #13 CW layout. COTA is next with 20.

How many of these courses run clockwise?

7 run clockwise and 3 run counter-clockwise (COTA, Laguna Seca, and Daytona road). Palmer and Buttonwillow (except the Circuit) can run either way. The other 8 have no published direction.

Which course is the oldest?

Sebring, which opened on December 31, 1950. Willow Springs is next. It opened on November 23, 1953.

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