Road course · California, USA
Buttonwillow Raceway Park
Buttonwillow Raceway Park is a road course in California. OpenStreetMap maps 6 layouts here, the longest 2.96 mi (4.77 km). Below: the map, every corner with a computed line, the elevation, and where to stay and eat.
- 2.96
- Miles
- 18
- Corners
- 4
- Ft of elevation
01Track map
Buttonwillow track map
Full circuit
Name inferred by TRACK from the mapped loops, not an official layout name.
- Mapped length
- 2.96mi
- 4.77 km
- Direction
- Not mapped
- TRACK takes it from your first drive.
- Start/finish line
- Estimated
- Estimated by TRACK from the mapped geometry and not verified on site. TRACK asks you to confirm or move it before timing laps here, when you’re stopped.
- Corners
- 18
- Inferred from curvature, not official turn numbers
- Sectors
- 3
- Estimated, near each third of the lap
Source geometry: OpenStreetMap ↗. Something wrong? Fixing it in OpenStreetMap improves it for everyone.
02Overview
What Buttonwillow is like to drive.
The full circuit layout at Buttonwillow is 2.96 miles with 18 corners worth setting up for and about 4 ft of elevation change. A generic track-day car in our model brakes hard 15 times a lap and is at full throttle for about 46% of the distance; the longest straight runs roughly 1460 ft.
4 of the corners are slow (under 50 mph in the model), 9 are fast (over 75 mph). There are hairpins where exit speed matters more than entry. The corner notes below come from the mapped geometry, not from local knowledge; we’ll add a researched guide for Buttonwillow later.
03Lap at a glance
Where the speed is, and where the hills are.
- Length
- 2.96mi
- Elevation range
- 4ft
- Steepest grade
- 0%
- Braking zones
- 15model
- Full throttle
- 46% model
- Longest straight
- 1460ft
The speed trace is a model, not a real lap: a generic track-day car (about 1.1 g of cornering grip, 1 g braking, 150 W/kg) driven on the computed line through an assumed 12 m wide track. Use it to see where the braking zones and flat-out sections are, not to predict your speeds. Elevation: USGS 3DEP 1/3 arc-second (NED 10 m) via OpenTopoData, sampled every 25 m along the mapped centerline.
04Corner by corner
The corners at Buttonwillow.
TRACK’s own corner numbering (C1, C2…), found from the curvature of the mapped centerline. It isn’t the official turn numbering. Each diagram shows the computed line: the minimum-curvature path through an assumed 12 m wide track. It’s a geometric starting point. Your instructor’s line comes first.
- C1
Sunset
↱ RightmediumcornerTRACK numbering
A medium right-hand corner that turns about 86°, tightening to a radius of roughly 39 m (128 ft). The model car brakes for about 155 m (509 ft), from 122 to 61 mph. The computed line turns in from the left side, takes an apex close to the geometric apex, and lets the car run out to the left on exit.
- Turns
- 86° right
- Tightest radius
- 39 m
- Model speed
- 122 → 61 mph
- Braking (model)
- 155 m
- Grade
- 0.0%
- C2
Esses
↱ RightfastkinkTRACK numbering
A fast right-hand kink that turns about 26°, tightening to a radius of roughly 74 m (243 ft). The model car barely brakes here, carrying about 108 mph: a lift or a confident throttle balance. The computed line turns in from the left side, takes an apex close to the geometric apex, and lets the car run out to the left on exit.
- Turns
- 26° right
- Tightest radius
- 74 m
- Model speed
- ≈ 108 mph
- Braking (model)
- Lift / none
- Grade
- 0.0%
- C3
Star Mazda Turn
↰ LeftfastcornerTRACK numbering
A fast left-hand corner that turns about 46°, tightening to a radius of roughly 44 m (144 ft). The model car brakes for about 140 m (459 ft), from 131 to 89 mph. The computed line turns in from the right side, takes an early apex, about 5 m before the geometric apex, and lets the car run out to the right on exit.
- Turns
- 46° left
- Tightest radius
- 44 m
- Model speed
- 131 → 89 mph
- Braking (model)
- 140 m
- Grade
- 0.0%
- C4
Star Mazda Turn
↰ LeftslowhairpinTRACK numbering
A slow left-hand hairpin that turns about 137°, tightening to a radius of roughly 25 m (82 ft). The model car brakes for about 125 m (410 ft), from 94 to 47 mph. The computed line turns in from the right side, takes an early apex, about 15 m before the geometric apex, and lets the car run out to the right on exit.
- Turns
- 137° left
- Tightest radius
- 25 m
- Model speed
- 94 → 47 mph
- Braking (model)
- 125 m
- Grade
- 0.0%
- C5
Lost Hill
↰ LeftfastcornerTRACK numbering
A fast left-hand corner that turns about 57°, tightening to a radius of roughly 50 m (164 ft). The model car brakes for about 135 m (443 ft), from 123 to 76 mph. The computed line turns in from the right side, takes an early apex, about 25 m before the geometric apex, and lets the car run out to the right on exit.
- Turns
- 57° left
- Tightest radius
- 50 m
- Model speed
- 123 → 76 mph
- Braking (model)
- 135 m
- Grade
- +0.1%
- C6
Lost Hill
↱ RightfastcornerTRACK numbering
A fast right-hand corner that turns about 30°, tightening to a radius of roughly 68 m (223 ft). The model car barely brakes here, carrying about 98 mph: a lift or a confident throttle balance. The computed line turns in from the left side, takes a late apex, about 5 m after the corner’s geometric apex, and lets the car run out to the left on exit.
- Turns
- 30° right
- Tightest radius
- 68 m
- Model speed
- ≈ 98 mph
- Braking (model)
- Lift / none
- Grade
- +0.1%
- C7
Riverside
↰ LeftfastcornerTRACK numbering
A fast left-hand corner that turns about 104°, tightening to a radius of roughly 67 m (220 ft). The model car brakes for about 120 m (394 ft), from 110 to 85 mph. The computed line turns in from the right side, takes an early apex, about 5 m before the geometric apex, and lets the car run out to the right on exit.
- Turns
- 104° left
- Tightest radius
- 67 m
- Model speed
- 110 → 85 mph
- Braking (model)
- 120 m
- Grade
- 0.0%
- C8
Truck Stop
↰ LeftfastessesTRACK numbering
A fast left-hand esses that turns about 45°, tightening to a radius of roughly 62 m (203 ft). The model car brakes for about 35 m (115 ft), from 108 to 92 mph. The computed line turns in from the right side, takes a late apex, about 115 m after the corner’s geometric apex, and lets the car run out to the right on exit.
- Turns
- 45° left
- Tightest radius
- 62 m
- Model speed
- 108 → 92 mph
- Braking (model)
- 35 m
- Grade
- -0.1%
- C9
Truck Stop
↱ RightfastessesTRACK numbering
A fast right-hand esses that turns about 44°, tightening to a radius of roughly 42 m (138 ft). The model car brakes for about 80 m (262 ft), from 108 to 80 mph. The computed line turns in from the left side, takes a late apex, about 5 m after the corner’s geometric apex, and lets the car run out to the left on exit.
- Turns
- 44° right
- Tightest radius
- 42 m
- Model speed
- 108 → 80 mph
- Braking (model)
- 80 m
- Grade
- -0.1%
- C10
Bus Stop
↱ RightfastessesTRACK numbering
A fast right-hand esses that turns about 40°, tightening to a radius of roughly 60 m (197 ft). The model car barely brakes here, carrying about 93 mph: a lift or a confident throttle balance. The computed line turns in from the left side, takes a late apex, about 50 m after the corner’s geometric apex, and lets the car run out to the left on exit.
- Turns
- 40° right
- Tightest radius
- 60 m
- Model speed
- ≈ 93 mph
- Braking (model)
- Lift / none
- Grade
- +0.1%
- C11
Club Corner
↰ LeftfastessesTRACK numbering
A fast left-hand esses that turns about 35°, tightening to a radius of roughly 44 m (144 ft). The model car brakes for about 65 m (213 ft), from 108 to 94 mph. The computed line turns in from the right side, takes an early apex, about 35 m before the geometric apex, and lets the car run out to the right on exit.
- Turns
- 35° left
- Tightest radius
- 44 m
- Model speed
- 108 → 94 mph
- Braking (model)
- 65 m
- Grade
- +0.1%
- C12
Grapevine
↱ RightmediumchicaneTRACK numbering
A medium right-hand chicane that turns about 165°, tightening to a radius of roughly 42 m (138 ft). The model car brakes for about 40 m (131 ft), from 77 to 64 mph. The computed line turns in from the left side, takes a late apex, about 75 m after the corner’s geometric apex, and lets the car run out to the left on exit.
- Turns
- 165° right
- Tightest radius
- 42 m
- Model speed
- 77 → 64 mph
- Braking (model)
- 40 m
- Grade
- +0.1%
- C13
Cotton Corners
↰ LeftmediumchicaneTRACK numbering
A medium left-hand chicane that turns about 104°, tightening to a radius of roughly 36 m (118 ft). The model car brakes for about 40 m (131 ft), from 77 to 64 mph. The computed line turns in from the right side, takes a late apex, about 70 m after the corner’s geometric apex, and lets the car run out to the right on exit.
- Turns
- 104° left
- Tightest radius
- 36 m
- Model speed
- 77 → 64 mph
- Braking (model)
- 40 m
- Grade
- +0.1%
- C14
Cotton Corners
↰ LeftmediumcornerTRACK numbering
A medium left-hand corner that turns about 42°, tightening to a radius of roughly 36 m (118 ft). The model car brakes for about 40 m (131 ft), from 77 to 64 mph. The computed line turns in from the right side, takes an early apex, about 5 m before the geometric apex, and lets the car run out to the right on exit.
- Turns
- 42° left
- Tightest radius
- 36 m
- Model speed
- 77 → 64 mph
- Braking (model)
- 40 m
- Grade
- +0.1%
- C15
Slow left-hander
↰ LeftslowchicaneTRACK numbering
A slow left-hand chicane that turns about 70°, tightening to a radius of roughly 20 m (66 ft). The model car brakes for about 130 m (427 ft), from 108 to 41 mph. The computed line turns in from the right side, takes a late apex, about 60 m after the corner’s geometric apex, and lets the car run out to the right on exit.
- Turns
- 70° left
- Tightest radius
- 20 m
- Model speed
- 108 → 41 mph
- Braking (model)
- 130 m
- Grade
- -0.1%
- C16
Slow left-hander
↰ LeftslowhairpinTRACK numbering
A slow left-hand hairpin that turns about 195°, tightening to a radius of roughly 12 m (39 ft). The model car brakes for about 130 m (427 ft), from 108 to 41 mph. The computed line turns in from the right side, takes an early apex, about 120 m before the geometric apex, and lets the car run out to the right on exit.
- Turns
- 195° left
- Tightest radius
- 12 m
- Model speed
- 108 → 41 mph
- Braking (model)
- 130 m
- Grade
- -0.1%
- C17
Sunrise
↱ RightslowkinkTRACK numbering
A slow right-hand kink that turns about 18°, tightening to a radius of roughly 84 m (276 ft). The model car brakes for about 50 m (164 ft), from 65 to 39 mph. The computed line turns in from the left side, takes an early apex, about 25 m before the geometric apex, and lets the car run out to the left on exit.
- Turns
- 18° right
- Tightest radius
- 84 m
- Model speed
- 65 → 39 mph
- Braking (model)
- 50 m
- Grade
- 0.0%
- C18
Sunrise
↱ RightmediumcornerTRACK numbering
A medium right-hand corner that turns about 101°, tightening to a radius of roughly 48 m (157 ft). The model car brakes for about 110 m (361 ft), from 95 to 65 mph. The computed line turns in from the left side, takes a late apex, about 5 m after the corner’s geometric apex, and lets the car run out to the left on exit.
- Turns
- 101° right
- Tightest radius
- 48 m
- Model speed
- 95 → 65 mph
- Braking (model)
- 110 m
- Grade
- -0.1%
05Configurations
Every mapped loop at Buttonwillow.
TRACK finds each closed loop in the OpenStreetMap raceway network. Named layouts come from OSM circuit relations; the rest are named by length, and some may be combinations the venue never runs. Your first session confirms which one you drove.
Full circuit
2.96 mi4.77 kmDirection unknownS/F EstimatedName inferred
Layout B · 4.7 km
2.89 mi4.66 kmDirection unknownS/F EstimatedName inferred
Layout C · 4.5 km
2.79 mi4.49 kmDirection unknownS/F EstimatedName inferred
Layout D · 4.5 km
2.77 mi4.46 kmDirection unknownS/F EstimatedName inferred
Layout E · 4.2 km
2.61 mi4.21 kmDirection unknownS/F EstimatedName inferred
Layout F · 4.2 km
2.58 mi4.15 kmDirection unknownS/F EstimatedName inferred
06Time it with TRACK
Drive Buttonwillow. TRACK knows where you are.
No setup and no transponder. Start a session in the paddock and TRACK recognises Buttonwillow and the layout from your GPS trace, then times every lap and sector with a live delta to your best.
- 1DetectTRACK matches your first few hundred metres against every mapped layout at Buttonwillow, including shared pavement between configurations.
- 2Confirm the lineThe start/finish line here is estimated. When you’re stopped, TRACK shows it on the map: accept it or tap to move it. You’re never asked while driving.
- 3Laps, timed retroactivelyLaps you drove before confirming are timed from the recorded trace, so you don’t lose your first session.
- 4Go furtherSync a GoPro for video with telemetry and let TRACK Engineer point out where the time is. External 10–25 Hz GPS receivers for tighter sectors are awaiting hardware validation.
- Venue and layout detection is tested on simulated drives over real OpenStreetMap circuits, not yet in a real car. Compatible GPS receivers
07Plan your trip
Getting there, staying, eating.
Nearby places for Buttonwillow haven’t been loaded yet.
08Track days
Find an open track day at Buttonwillow.
TRACK doesn’t copy event listings. An on-page calendar will come with an organizer data partnership.
Before your first day here
09Nearby tracks
Closest mapped venues.
- Willow Springs International RacewayCalifornia · 84 mi away
- Streets of Willow SpringsCalifornia · 84 mi away
- WeatherTech Raceway Laguna SecaCalifornia · 145 mi away
- Spring Mountain Motor ResortNevada · 209 mi away
Straight-line distance between venues. All 96 tracks
FAQ
Buttonwillow, answered.
How long is Buttonwillow?
OpenStreetMap maps 6 closed loops at Buttonwillow Raceway Park, from 2.58 mi to 2.96 mi (4.77 km). These are mapped centerline lengths; the venue’s published figures can differ slightly.
How much elevation change is there at Buttonwillow?
About 4 ft (1 m) between the lowest and highest points of the full circuit layout, from USGS 3DEP elevation data sampled every 25 m. The steepest stretch is around 0%.
Which direction does Buttonwillow run?
OpenStreetMap doesn’t record a direction for the main layout at Buttonwillow. Venues sometimes run both ways. TRACK takes the direction from your first laps.
Can I time laps at Buttonwillow with my phone?
Yes, with the TRACK iPhone app (beta). It recognises Buttonwillow and the layout you’re driving from GPS, then times laps and sectors. A phone’s GPS is good for lap times; an external 10–25 Hz receiver tightens sector splits.
Where is the start/finish line at Buttonwillow?
TRACK estimates the line from the mapped geometry (usually beside the pit lane, or on the longest straight). It isn’t verified on site, so the app asks you to confirm or move it before timing your first session here.
How do I find track days at Buttonwillow?
Clubs and organizers list HPDE, track days and club races on MotorsportReg. The venue’s own calendar lists its events too. TRACK doesn’t list events itself.
Where can I stay near Buttonwillow?
This page lists hotels, campgrounds, restaurants, fuel and parts stores near Buttonwillow from OpenStreetMap, with straight-line distances. Book early for big event weekends.
Track geometry and nearby places: © OpenStreetMap contributors, available under the Open Database License 1.0 (via the TRACK Atlas, snapshot 2026-10-17). Elevation: USGS 3DEP (public domain). Lengths are mapped centerlines, not official figures. The computed line and speed trace are a model. No start/finish line has been verified on site.
TRACK is not affiliated with or endorsed by Buttonwillow Raceway Park, MotorsportReg or any business listed here. The venue name identifies the location only and belongs to its owner. TRACK shows no lap records or official results for this venue. Driving advice is general: your instructor, the event’s rules and the venue’s rules come first.