Does altitude change your sight marks?
Yes — thinner air means less drag, a flatter arrow, and high hits if you dial your home tape's number. The table shows what to actually dial ("shoot for") when your tape was made near sea level (500 ft density altitude) and you're hunting higher:
| Ranged | @ 3,000 ft DA | @ 6,000 ft DA | @ 9,000 ft DA |
|---|---|---|---|
| 30 yd | 30 | 29.9 | 29.9 |
| 40 yd | 39.9 | 39.8 | 39.7 |
| 50 yd | 49.9 | 49.7 | 49.5 |
| 60 yd | 59.8 | 59.5 | 59.3 |
| 70 yd | 69.7 | 69.3 | 69 |
| 80 yd | 79.6 | 79.1 | 78.6 |
| 90 yd | 89.5 | 88.8 | 88.2 |
| 100 yd | 99.3 | 98.5 | 97.8 |
The effect is small inside 60 yards — under a yard — which is why most hunters never notice it. Past 80 yards at real elevation it's 1.5–2.5 yards of dial error: enough to miss low when you come back down, or high when you fly out West with a flatland tape.
Density altitude, not elevation
What matters is density altitude — elevation corrected for temperature and pressure. A 90°F day at 6,000 ft behaves like 9,000+ ft. Cold mornings push DA down. Pro-level tape programs (ours included) generate the tape for the DA you'll hunt, or a set of travel tapes bracketing it.
FAQ
Do I need a new sight tape when I hunt at elevation?
Inside 60 yards, your home tape is fine — the error is under a yard. For Western hunts with shots past 70, either generate a tape for the destination DA or carry travel tapes bracketing it.
How much flatter does an arrow shoot at 9,000 ft?
For a typical 285 fps setup, dialing about 2.5 yards under your ranged distance at 100 yards — e.g. shoot your 97.5 mark for a true 100. At 50 yards the correction is ~0.7 yd.
These numbers are validated
Every table on this page comes from the same trajectory engine that powers The Forge — validated cell-by-cell against Precision Cut Archery's published charts (mean agreement 0.06–0.12 yd across the full ±60° envelope) and against real chronograph data. We publish our methods and our version history — see how we test.