Road course · Japan
Sodegaura Forest Raceway
Sodegaura Forest Raceway is a road course in Japan. OpenStreetMap maps 4 layouts here, the longest 1.50 mi (2.42 km). Below: the map, every corner with a computed line, the elevation, and where to stay and eat.
- 2.42
- Kilometres
- 9
- Corners
- —
- Ft of elevation
01Track map
Sodegaura Forest Raceway track map
Full circuit
Name inferred by TRACK from the mapped loops, not an official layout name.
- Mapped length
- 1.50mi
- 2.42 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
- 9
- 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 Sodegaura Forest Raceway is like to drive.
The full circuit layout at Sodegaura Forest Raceway is 1.50 miles with 9 corners worth setting up for. A generic track-day car in our model brakes hard 8 times a lap and is at full throttle for about 32% of the distance; the longest straight runs roughly 558 ft.
3 of the corners are slow (under 50 mph in the model), 1 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 Sodegaura Forest Raceway later.
03Lap at a glance
Where the speed is, and where the hills are.
- Length
- 1.50mi
- Elevation range
- —
- Steepest grade
- —
- Braking zones
- 8model
- Full throttle
- 32% model
- Longest straight
- 558ft
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 data for this track isn’t loaded yet.
04Corner by corner
The corners at Sodegaura Forest Raceway.
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
袖ヶ浦フォレストレースウェイ
↰ LeftmediumcornerTRACK numbering
A medium left-hand corner that turns about 127°, tightening to a radius of roughly 40 m (131 ft). The model car brakes for about 150 m (492 ft), from 112 to 56 mph. The computed line turns in from the right side, takes a late apex, about 15 m after the corner’s geometric apex, and lets the car run out to the right on exit.
- Turns
- 127° left
- Tightest radius
- 40 m
- Model speed
- 112 → 56 mph
- Braking (model)
- 150 m
- Grade
- —
- C2
袖ヶ浦フォレストレースウェイ
↰ LeftmediumkinkTRACK numbering
A medium left-hand kink that turns about 12°, tightening to a radius of roughly 109 m (358 ft). The model car brakes for about 70 m (230 ft), from 96 to 58 mph. The computed line turns in from the right side, takes a late apex, about 75 m after the corner’s geometric apex, and lets the car run out to the right on exit.
- Turns
- 12° left
- Tightest radius
- 109 m
- Model speed
- 96 → 58 mph
- Braking (model)
- 70 m
- Grade
- —
- C3
袖ヶ浦フォレストレースウェイ
↰ LeftslowhairpinTRACK numbering
A slow left-hand hairpin that turns about 179°, tightening to a radius of roughly 20 m (66 ft). The model car brakes for about 130 m (427 ft), from 96 to 37 mph. The computed line turns in from the right side, takes an early apex, about 10 m before the geometric apex, and lets the car run out to the right on exit.
- Turns
- 179° left
- Tightest radius
- 20 m
- Model speed
- 96 → 37 mph
- Braking (model)
- 130 m
- Grade
- —
- C4
袖ヶ浦フォレストレースウェイ
↱ RightslowhairpinTRACK numbering
A slow right-hand hairpin that turns about 166°, tightening to a radius of roughly 33 m (108 ft). The model car brakes for about 130 m (427 ft), from 96 to 37 mph. The computed line turns in from the left side, takes a late apex, about 60 m after the corner’s geometric apex, and lets the car run out to the left on exit.
- Turns
- 166° right
- Tightest radius
- 33 m
- Model speed
- 96 → 37 mph
- Braking (model)
- 130 m
- Grade
- —
- C5
袖ヶ浦フォレストレースウェイ
↰ LeftmediumkinkTRACK numbering
A medium left-hand kink that turns about 27°, tightening to a radius of roughly 58 m (190 ft). The model car barely brakes here, carrying about 57 mph: a lift or a confident throttle balance. The computed line turns in from the right side, takes a late apex, about 90 m after the corner’s geometric apex, and lets the car run out to the right on exit.
- Turns
- 27° left
- Tightest radius
- 58 m
- Model speed
- ≈ 57 mph
- Braking (model)
- Lift / none
- Grade
- —
- C6
袖ヶ浦フォレストレースウェイ
↱ RightmediumhairpinTRACK numbering
A medium right-hand hairpin that turns about 174°, tightening to a radius of roughly 35 m (115 ft). The model car brakes for about 25 m (82 ft), from 63 to 61 mph. The computed line turns in from the left side, takes a late apex, about 15 m after the corner’s geometric apex, and lets the car run out to the left on exit.
- Turns
- 174° right
- Tightest radius
- 35 m
- Model speed
- 63 → 61 mph
- Braking (model)
- 25 m
- Grade
- —
- C7
袖ヶ浦フォレストレースウェイ
↰ LeftslowhairpinTRACK numbering
A slow left-hand hairpin that turns about 197°, tightening to a radius of roughly 17 m (56 ft). The model car brakes for about 120 m (394 ft), from 101 to 39 mph. The computed line turns in from the right side, takes an apex close to the geometric apex, and lets the car run out to the right on exit.
- Turns
- 197° left
- Tightest radius
- 17 m
- Model speed
- 101 → 39 mph
- Braking (model)
- 120 m
- Grade
- —
- C8
袖ヶ浦フォレストレースウェイ
↰ LeftfastcornerTRACK numbering
A fast left-hand corner that turns about 57°, tightening to a radius of roughly 48 m (157 ft). The model car brakes for about 90 m (295 ft), from 104 to 76 mph. The computed line turns in from the right side, takes a late apex, about 5 m after the corner’s geometric apex, and lets the car run out to the right on exit.
- Turns
- 57° left
- Tightest radius
- 48 m
- Model speed
- 104 → 76 mph
- Braking (model)
- 90 m
- Grade
- —
- C9
袖ヶ浦フォレストレースウェイ
↰ LeftmediumcornerTRACK numbering
A medium left-hand corner that turns about 93°, tightening to a radius of roughly 35 m (115 ft). The model car brakes for about 100 m (328 ft), from 97 to 56 mph. The computed line turns in from the right side, takes an early apex, about 10 m before the geometric apex, and lets the car run out to the right on exit.
- Turns
- 93° left
- Tightest radius
- 35 m
- Model speed
- 97 → 56 mph
- Braking (model)
- 100 m
- Grade
- —
05Configurations
Every mapped loop at Sodegaura Forest Raceway.
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
1.50 mi2.42 kmDirection unknownS/F EstimatedName inferred
Layout B · 2.4 km
1.49 mi2.39 kmDirection unknownS/F EstimatedName inferred
Layout C · 1.5 km
0.92 mi1.49 kmDirection unknownS/F EstimatedName inferred
Layout D · 1.5 km
0.91 mi1.46 kmDirection unknownS/F EstimatedName inferred
06Time it with TRACK
Drive Sodegaura Forest Raceway. TRACK knows where you are.
No setup and no transponder. Start a session in the paddock and TRACK recognises Sodegaura Forest Raceway 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 Sodegaura Forest Raceway, 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 Sodegaura Forest Raceway haven’t been loaded yet.
08Track days
Find an open track day at Sodegaura Forest Raceway.
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.
- Mobara Twin CircuitJapan · 11 mi away
- Autoland ChibaJapan · 19 mi away
- セーフティーパーク千葉Japan · 20 mi away
- The Magarigawa ClubJapan · 25 mi away
Straight-line distance between venues. All 889 tracks
FAQ
Sodegaura Forest Raceway, answered.
How long is Sodegaura Forest Raceway?
OpenStreetMap maps 4 closed loops at Sodegaura Forest Raceway, from 0.91 mi to 1.50 mi (2.42 km). These are mapped centerline lengths; the venue’s published figures can differ slightly.
Which direction does Sodegaura Forest Raceway run?
OpenStreetMap doesn’t record a direction for the main layout at Sodegaura Forest Raceway. Venues sometimes run both ways. TRACK takes the direction from your first laps.
Can I time laps at Sodegaura Forest Raceway with my phone?
Yes, with the TRACK iPhone app (beta). It recognises Sodegaura Forest Raceway 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 Sodegaura Forest Raceway?
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 Sodegaura Forest Raceway?
Clubs and organizers list HPDE, track days and club races on MotorsportReg. The venue’s own calendar (also linked) lists its events too. TRACK doesn’t list events itself.
Where can I stay near Sodegaura Forest Raceway?
This page lists hotels, campgrounds, restaurants, fuel and parts stores near Sodegaura Forest Raceway 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 Sodegaura Forest Raceway, 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.