Maple Grove Raceway — Density Altitude
Mohnton, PA · Track elevation 541.3 ft. Get today's air before you touch a jet or a dial-in.
No connection? Enter your weather station readings — the math is identical.
Density altitude
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Racing the air at Maple Grove Raceway
The physical elevation here is 541.3 feet, but your engine doesn't read a survey marker — it reads density. On a hot, humid afternoon the density altitude at this track can run thousands of feet above the physical elevation, and your car slows exactly as if you'd towed it up a mountain. On a cool, dry morning it can run below it.
Three moves once you know today's number: check what the air does to your ET with the weather-corrected ET calculator, size your jet change with the jetting calculator, and if you bracket race, expect your dial to move with the density trend through the day — the pattern is in the bracket racing math guide.
About this track: Former NHRA national event — Reading Nationals (through 2025); IHRA-owned since 2025