Putnam Park Road Course is a 1.8-mile road course in Greencastle, IN. Across a road course, density altitude (shown live above) sets the power your engine makes, while track temperature moves grip corner to corner. The live DA is your baseline for braking markers and gearing.
As temperature, humidity and barometric pressure shift across a race night near Greencastle, the density altitude above moves with them — and your tune should follow. Most weather apps show sea-level-corrected pressure, which gives the wrong DA; racer.wiki uses uncorrected station pressure for the real number. Read the full density altitude guide →
Grip around Putnam Park Road Course shifts with track temperature corner to corner, and density altitude sets your power and braking markers. Why DA decides your power →
Custom race shirts, pit crew hoodies, and all-over print jerseys for Putnam Park Road Course fans and drivers. Search 1,461 tracks for logo art, add your number, live mockup — no MyRacePass $72/yr or design fees.
Open Merch Studio →