Slidensa
TracksNagano Spiral

Closed 1996–2018

Nagano Spiral

Spiral (Nagano Bobsleigh-Luge Park)

Iizuna, Nagano, Nagano Prefecture · Japan

No ice since 2018; the push-bob facility is used for training, and the dry course also serves as a seasonal Nordic-walking route.

No mapped line survives for this track yet.

Real track · Published figures

First raced
1996
Last raced
2018
Length
1,360 m
Drop
113 m
Curves
15

The city lists 15 curves and maps them as C1–C15; other published accounts give 14. The bobsleigh competition course is 1,360 m within a 1,700 m structure.

Explore the track

The Slidensa model, drawn over the real ground. Follow the run into every curve.

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The 3D map needs WebGL, which this browser does not offer.

Game model · Two-man bobsleigh reference run. These lengths, speeds and loads come from Slidensa’s physics and can differ from the real track’s published figures.

Length
1,974m
Drop
113m
Curves
15
Top speed
126km/h
Peak load
4.9g
Reference run
1:16.63
Curve-by-curve guide · 15 curves

The three curves in lime pull hardest in the reference run.

  1. Curve 1 183° left 1.4 g · 57 km/h
  2. Curve 2 185° left 1.5 g · 62 km/h
  3. Curve 4 360° left 2.2 g · 82 km/h
  4. Curve 3 91° left Kink 2.1 g · 77 km/h
  5. Curve 5 360° left 2.9 g · 95 km/h
  6. Curve 6 83° left Kink 2.8 g · 96 km/h
  7. Curve 7 360° left 3.6 g · 107 km/h
  8. Curve 8 66° left Kink 3.5 g · 108 km/h
  9. Curve 9 3° left 1.3 g · 110 km/h
  10. Curve 10 359° left 4.9 g · 119 km/h
  11. Curve 12 536° left 4.8 g · 124 km/h
  12. Curve 11 25° left Kink 2.0 g · 126 km/h
  13. Curve 13 0° left Kink 1.0 g · 125 km/h
  14. Curve 14 358° left 4.8 g · 122 km/h
  15. Curve 15 25° left 3.6 g · 120 km/h

The story

Built from November 1993 and handed over in April 1996 for the 1998 Nagano Winter Olympics, the Spiral has two uphill sections, a world first by its organisers' account. After the Games it hosted the skeleton World Championships in 2003 and the luge World Championships in 2004. Ice-making stopped in February 2018, after its yearly budget had been cut from about 220 million to 20 million yen and its equipment had worn out. Hopes of reusing it ended with the collapse of Sapporo's 2030 bid.

  • Its organisers called it the first track in the world with two uphill sections.
  • Its yearly budget was cut by about 90%, from roughly 220 million to 20 million yen.
  • Its refrigeration, lighting and scoreboard all needed replacing when the ice stopped.

Today

The track still stands with its cooling fluid drained; the city keeps it as a national training centre.

See the place on OpenStreetMap
The Spiral, Nagano's Olympic bob and luge track.
The Spiral, Nagano's Olympic bob and luge track. Photo: Tsutomu Shinohara, CC BY-SA 3.0.

Racing history

Earliest and latest recorded race of each event at this level, from published results.

Olympic Games

Two-man bob 1998
Four-man bob 1998
Men's luge 1998
Women's luge 1998
Doubles luge 1998

World Championships

Men's luge 2004
Women's luge 2004
Doubles luge 2004
Men's skeleton 2003
Women's skeleton 2003