Drag Strip · IHRA drag strip in Martin, MI, USA
US 131 Motorsports Park
US 131 Motorsports Park is an IHRA-sanctioned drag strip located in Martin, MI, USA. The track runs 1/4 mile (1,320 ft). The racing surface is prepped concrete launch pad, asphalt shutdown. The strip runs S at 170°, which affects headwind and tailwind at this location. At 750 ft above sea level, air density changes here are meaningful — a hot summer afternoon can push density altitude 1,500+ ft above the base elevation.
Track facts — US 131 Motorsports Park
- Sanction
- IHRA
- Location
- Martin, MI, USA
- Latitude
- 42.5129°
- Longitude
- -85.6576°
- Elevation
- 750 ft (229 m)
- Strip length
- 1/4 mile (1,320 ft)
- Surface
- Prepped concrete launch pad, asphalt shutdown
- Strip heading
- 170° (S)
Density altitude context at US 131 Motorsports Park
US 131 Motorsports Park sits at 750 ft. Density altitude — the altitude your engine "feels" — climbs from that baseline whenever the air gets hotter, more humid, or the barometer drops. Higher DA = thinner air = less oxygen per cubic inch = slower elapsed times.
Across the season at this strip, the difference between a cool, dry morning and a hot, sticky afternoon can be 2,000+ feet of DA — enough to swing a naturally-aspirated index car a tenth or more. A logbook tuned to live DA is the only honest way to compare passes day-to-day at US 131 Motorsports Park.
Open DA calculator pre-filled for US 131 Motorsports Park What is density altitude?
Logging runs at US 131 Motorsports Park
When you log a run at US 131 Motorsports Park, the app records the full timing sheet — reaction time, 60-ft, 330, 660, 1,000-ft, and ET — plus live atmospheric conditions pulled from the nearest NOAA station. That lets the AI predictor build a model tuned specifically to your car in the conditions that prevail at this track's elevation and climate.
Time slips from this track can be scanned with your phone camera. The AI reads the Compulink or Portatree format, auto-fills every field, and flags any value that looks out of range for review. Snap, confirm, done — before the return road ends.
- Scan time slips with your phone — no typing
- Live weather pulled automatically on each run
- ET predictor calibrated to this track's elevation (750 ft (229 m))
- Race Mode screen optimized for between-round use at the trailer
- Export every run to CSV — your data, your way
Sun chart for today at US 131 Motorsports Park — Tuesday, July 14, 2026
All times approximate, local to Martin, MI, USA for Tuesday, July 14, 2026. Solar noon — the moment the sun crosses the meridian — is when the air column above the track is most stable, the historic "fast lane" of the day for repeatable ETs.
Live weather & density altitude at US 131 Motorsports Park
Pulled live from the closest NOAA / National Weather Service station — or Open-Meteo's gridded model where NOAA doesn't reach. Refreshes whenever you load this page.
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Location of US 131 Motorsports Park
Satellite view of US 131 Motorsports Park — open in Google Maps. Coordinates: 42.5129°, -85.6576°.
Log your next pass at US 131 Motorsports Park with Drag Race Logbook Pro
Free plan includes 5 manual runs + 2 logbook pages imported from photos. AI time-slip scanning, live density altitude, and ET prediction unlock on Pro — cancel anytime.