Drag Strip · NHRA drag strip in Earlville, IA, USA
Tri-State Raceway
Tri-State Raceway is an NHRA-sanctioned drag strip located in Earlville, IA, USA. The track runs 1/4 mile (1,320 ft). At 997 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.
What are the key facts about Tri-State Raceway?
- Sanction
- NHRA
- Location
- Earlville, IA, USA
- Latitude
- 42.4816°
- Longitude
- -91.2724°
- Elevation
- 997 ft (304 m)
- Strip length
- 1/4 mile (1,320 ft)
- Surface
- —
- Strip heading
- Unknown
How does density altitude affect runs at Tri-State Raceway?
Tri-State Raceway sits at 997 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 Tri-State Raceway.
Open DA calculator pre-filled for Tri-State Raceway What is density altitude?
How can I log runs at Tri-State Raceway?
When you log a run at Tri-State Raceway, 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 (997 ft (304 m))
- Race Mode screen optimized for between-round use at the trailer
- Export every run to CSV — your data, your way
When does the sun rise and set at Tri-State Raceway today?
Loading today's sun times…
What are the live weather and density-altitude conditions at Tri-State Raceway?
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.
Loading live conditions…
Where is Tri-State Raceway?
Satellite view of Tri-State Raceway — open in Google Maps. Coordinates: 42.4816°, -91.2724°.
How can I log my next pass at Tri-State Raceway with Drag Race Logbook Pro?
Free plan includes 20 manual runs + 5 logbook pages imported from photos. AI time-slip scanning, live density altitude, and ET prediction unlock on Pro — cancel anytime.