Soldier Bar, Idaho · field elev 4,190 ft
Density Altitude at Soldier Bar Usfs (85U)
From a field elevation of 4,190 ft, a typical July afternoon at Soldier Bar Usfs (88 °F) raises density altitude to about 6,974 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 | 23.6 | 2,827 ft | 30.9 | 3,328 ft |
| February | 28.9 | 3,192 ft | 38.4 | 3,834 ft |
| March | 38.2 | 3,820 ft | 49.8 | 4,584 ft |
| April | 45.8 | 4,323 ft | 58.7 | 5,156 ft ▲ |
| May | 53.9 | 4,849 ft | 68.1 | 5,747 ft ▲ |
| June | 60.9 | 5,296 ft | 76.4 | 6,258 ft ▲ |
| July | 69.7 | 5,846 ft | 88.3 | 6,974 ft ▲ |
| August | 68.4 | 5,766 ft | 87.2 | 6,909 ft ▲ |
| September | 58.7 | 5,156 ft | 75.9 | 6,228 ft ▲ |
| October | 45.5 | 4,304 ft | 58.0 | 5,112 ft ▲ |
| November | 32.7 | 3,450 ft | 40.6 | 3,980 ft |
| December | 23.5 | 2,820 ft | 30.2 | 3,281 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 85U
DENSITY ALTITUDE caution
Field elevation 4,190 ft — the air behaves like 6,956 ft.
- PRESSURE ALT
- 4,192 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 Idaho fields
- I08 — Cabin Creek Usfs
Big Creek Ranger Station · elev 4,289 ft
- U54 — Bernard Usfs
Bernard · elev 3,626 ft
- 4D2 — Hoodoo Meadows
Salmon · elev 8,262 ft
- U81 — Cold Meadows Usfs
Cold Meadows Guard Station · elev 7,030 ft
- C53 — Lower Loon Creek
Challis · elev 4,200 ft
- ID8 — Marble Creek
Challis · elev 4,685 ft
- 0U3 — Mahoney Creek Usfs
Mahoney Creek · elev 4,618 ft
- D47 — Cougar Ranch
Challis · elev 4,277 ft
Frequently asked questions
How high does density altitude get at 85U in summer?
On a typical July afternoon — around 88 °F at the nearest NOAA normals station — density altitude at Soldier Bar Usfs reaches roughly 6,974 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 85U on an average day?
It swings with the seasons: from roughly 2,820 ft at the coldest month's average temperature to about 5,846 ft at the warmest month's — all from a constant field elevation of 4,190 ft. The month-by-month table above carries the full year.
What is the field elevation of Soldier Bar Usfs?
4,190 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 85U (FAA), in Soldier Bar, Idaho.