Enterprise, Oregon · field elev 3,613 ft
Density Altitude at Reds Horse Ranch Usfs (68D)
From a field elevation of 3,613 ft, a typical August afternoon at Reds Horse Ranch Usfs (80 °F) raises density altitude to about 5,757 ft — solidly into the range where performance charts deserve a close read.
Typical density altitude by month
| Month | Avg temp °F | DA at avg temp | Afternoon high °F | DA on a typical afternoon |
|---|---|---|---|---|
| January | 26.9 | 2,336 ft | 34.9 | 2,883 ft |
| February | 29.2 | 2,494 ft | 39.1 | 3,166 ft |
| March | 36.3 | 2,978 ft | 46.3 | 3,644 ft |
| April | 41.1 | 3,299 ft | 51.8 | 4,004 ft |
| May | 49.7 | 3,867 ft | 61.0 | 4,595 ft |
| June | 56.3 | 4,294 ft | 68.4 | 5,061 ft ▲ |
| July | 64.0 | 4,785 ft | 79.3 | 5,733 ft ▲ |
| August | 64.5 | 4,816 ft | 79.7 | 5,757 ft ▲ |
| September | 57.0 | 4,339 ft | 70.6 | 5,198 ft ▲ |
| October | 45.0 | 3,558 ft | 56.1 | 4,281 ft |
| November | 33.9 | 2,815 ft | 42.7 | 3,406 ft |
| December | 26.2 | 2,287 ft | 34.7 | 2,869 ft |
▲ above 5,000 ft · ⚠ above 8,000 ft. These are planning references at standard pressure and dry air — afternoon humidity and low pressure both push the real number higher. Run today's values below.
Run today’s numbers for 68D
DENSITY ALTITUDE caution
Field elevation 3,613 ft — the air behaves like 5,775 ft.
- PRESSURE ALT
- 3,615 ft
- ISA DEVIATION
- —
- RULE-OF-THUMB DA
- —
- AIR DENSITY INDEX
- —
- AIR DENSITY
- —
- WATER · GRAINS/LB
- —
For training and reference · verify with official sources and your POH before flight · no tool on this site renders a go / no-go judgment
Nearby Oregon fields
- KJSY — Joseph State
Joseph · elev 4,126 ft
- 8S4 — Enterprise Municipal
Enterprise · elev 3,957 ft
- KLGD — La Grande/Union County
La Grande · elev 2,718 ft
- KBKE — Baker City Municipal
Baker City · elev 3,373 ft
- O62 — B & H Usfs
Enterprise · elev 4,007 ft
- 25U — Memaloose Usfs
Imnaha · elev 6,708 ft
- O68 — Sluice Creek
Imnaha · elev 1,370 ft
- O48 — Salmon Bar
Imnaha · elev 947 ft
Frequently asked questions
How high does density altitude get at 68D in summer?
On a typical August afternoon — around 80 °F at the nearest NOAA normals station — density altitude at Reds Horse Ranch Usfs reaches roughly 5,757 ft at standard pressure. Hotter-than-normal days, low pressure, and humidity all push it higher, so run the day's actual numbers before flying.
What is the density altitude at 68D on an average day?
It swings with the seasons: from roughly 2,287 ft at the coldest month's average temperature to about 4,816 ft at the warmest month's — all from a constant field elevation of 3,613 ft. The month-by-month table above carries the full year.
What is the field elevation of Reds Horse Ranch Usfs?
3,613 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 68D (FAA), in Enterprise, Oregon.