Why altitude changes golf carry distance
Golf shots usually carry farther at altitude because thinner air reduces aerodynamic drag. That is why mountain golf often feels as if your stock carry numbers have quietly shifted upward even before you have had time to recalibrate your yardage book.
The important word is usually. Altitude changes the air, but it does not erase the rest of ball flight. Wind, temperature, strike quality, spin, and landing conditions still matter, which is why an altitude estimate should be treated as a starting point rather than as a promise.