Alkali Lake, Oregon · field elev 4,312 ft
Density Altitude at Alkali Lake State (R03)
From a field elevation of 4,312 ft, a typical July afternoon at Alkali Lake State (88 °F) raises density altitude to about 7,110 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 | 31.5 | 3,521 ft | 42.9 | 4,283 ft |
| February | 33.1 | 3,629 ft | 45.4 | 4,448 ft |
| March | 38.2 | 3,971 ft | 51.6 | 4,851 ft |
| April | 42.8 | 4,277 ft | 58.3 | 5,280 ft ▲ |
| May | 51.4 | 4,838 ft | 66.8 | 5,815 ft ▲ |
| June | 58.3 | 5,280 ft | 75.8 | 6,370 ft ▲ |
| July | 67.8 | 5,877 ft | 88.1 | 7,110 ft ▲ |
| August | 66.8 | 5,815 ft | 86.8 | 7,033 ft ▲ |
| September | 57.7 | 5,242 ft | 77.1 | 6,449 ft ▲ |
| October | 46.1 | 4,494 ft | 63.6 | 5,615 ft ▲ |
| November | 36.2 | 3,838 ft | 49.7 | 4,728 ft |
| December | 30.1 | 3,425 ft | 41.3 | 4,178 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 R03
DENSITY ALTITUDE caution
Field elevation 4,312 ft — the air behaves like 7,104 ft.
- PRESSURE ALT
- 4,314 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
- 62S — Christmas Valley
Christmas Valley · elev 4,320 ft
- 22S — Paisley
Paisley · elev 4,395 ft
- 45S — Silver Lake F S Strip
Silver Lake · elev 4,492 ft
- KBNO — Burns Municipal
Burns · elev 4,148 ft
- KLKV — Lake County
Lakeview · elev 4,734 ft
- S21 — Sunriver
Sunriver · elev 4,164 ft
- 2S2 — Beaver Marsh
Beaver Marsh · elev 4,638 ft
- KBDN — Bend Municipal
Bend · elev 3,459 ft
Frequently asked questions
How high does density altitude get at R03 in summer?
On a typical July afternoon — around 88 °F at the nearest NOAA normals station — density altitude at Alkali Lake State reaches roughly 7,110 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 R03 on an average day?
It swings with the seasons: from roughly 3,425 ft at the coldest month's average temperature to about 5,877 ft at the warmest month's — all from a constant field elevation of 4,312 ft. The month-by-month table above carries the full year.
What is the field elevation of Alkali Lake State?
4,312 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is R03 (FAA), in Alkali Lake, Oregon.