Drag Strip · NHRA drag strip in Mount Holly Springs, PA, USA
South Mountain Raceway
South Mountain Raceway is an NHRA-sanctioned drag strip located in Mount Holly Springs, PA, USA. The track runs 1/4 mile (1,320 ft). At 561 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 South Mountain Raceway?
- Sanction
- NHRA
- Location
- Mount Holly Springs, PA, USA
- Latitude
- 40.1184°
- Longitude
- -77.19°
- Elevation
- 561 ft (171 m)
- Strip length
- 1/4 mile (1,320 ft)
- Surface
- —
- Strip heading
- Unknown
How does density altitude affect runs at South Mountain Raceway?
South Mountain Raceway sits at 561 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 South Mountain Raceway.
Open DA calculator pre-filled for South Mountain Raceway What is density altitude?
How can I log runs at South Mountain Raceway?
When you log a run at South Mountain 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 (561 ft (171 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 South Mountain Raceway today?
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What are the live weather and density-altitude conditions at South Mountain 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.
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Where is South Mountain Raceway?
Satellite view of South Mountain Raceway — open in Google Maps. Coordinates: 40.1184°, -77.19°.
How can I log my next pass at South Mountain 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.