Mahlon Sweet Field to City Of Colorado Springs Municipal EUG → COS
890 nautical miles (1,024 statute miles) east on a straight line, true course 105°, about 090° magnetic at the departure end (variation 15E). At 120 knots that is 6 h 16 min at the quickest height in today's winds (34,000 ft, a 22-knot tailwind), arriving about 5:30 am MDT (11:30 UTC), after sunset at the destination. Right now EUG is VFR, wind from the east (090°) at 3 knots; COS is VFR, wind from the south (180°) at 11 knots. For planning, not a briefing: the legal preflight briefing comes from Flight Service (1-800-WX-BRIEF) or the FAA's own tools. Airlines fly this pair: 4 flights in the DOT's last twelve reported months, the route's page.
The route the straight line, the warnings crossed, restrictions, pilot reports and the airports along the way · click a mark for its words
Green, blue, red and purple airport dots are the flying conditions reported there now (VFR, marginal VFR, IFR, low IFR); grey means no report. Red areas are SIGMETs, orange areas AIRMETs, hatched red areas temporary flight restrictions. Map tiles: OpenFreeMap, data © OpenStreetMap contributors.
Warnings the route crosses SIGMETs and AIRMETs whose area the line passes through or comes within 25 nm of
- SIGMET 7C: thunderstorms (a convective SIGMET) up to 34,000 ft, moving from the southwest at 40 knots, until 11:55 pm PDT (06:55 UTC). Over the last 10 nm of the route.
as issued
WSUS32 KKCI 120455 MKCC WST 120455 CONVECTIVE SIGMET 7C VALID UNTIL 0655Z TX OK CO NM FROM 40NNW PUB-70WSW LBL-40NE CME-40ESE RSK-30ENE HBU-40NNW PUB AREA TS MOV FROM 22040KT. TOPS TO FL340.
- AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the first 210 nm of the route.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 110 to 130 nm out.
- AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the route from 270 to 400 nm out.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 320 to 750 nm out.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 340 to 680 nm out.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the last 330 nm of the route.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 38,000 ft. Over the last 320 nm of the route.
- AIRMET TANGO 1W: low-level wind shear (due to air speed loss or gain of 20 knots or more below 2,000 ft above the ground). Over the last 230 nm of the route.
- AIRMET TANGO 5W: strong surface winds (30 knots or more) (due to sustained surface winds greater than 30 knots). Near the route, 680 nm along the route.
A SIGMET warns of weather hazardous to all aircraft; an AIRMET of weather that matters to small aircraft and to flying without instruments. "From 60 to 180 nm out" is measured along the route from EUG.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- urgent B737 at 7,600 ft, 39 nm northeast, 8:22 pm PDT (03:22 UTC): remarks: low-level wind shear 45 knots crosswind on final. 740 nm along the route, 39 nm northeast of the line.
as filed, and in English
HDN UUA /OV HDN/TM 0322/FL076/TP B737/RM LLWS 45 KTS CROSSWIND ON FINAL
- Report
- an urgent report filed through HDN
- Where
- over HDN
- Time
- 03:22 UTC
- Height
- at 7,600 ft
- Aircraft
- B737
- Remarks
- low-level wind shear 45 knots crosswind on final
- urgent E75L at 9,000 ft, 22 nm southwest, 9:30 pm PDT (04:30 UTC): remarks: low-level wind shear + 20K 1000-1500 above ground on approach. 790 nm along the route, 22 nm southwest of the line.
as filed, and in English
ASE UUA /OV ASE/TM 0430/FL090/TP E75L/RM LLWS +/- 20K 1000-1500 AGL ON APCH
- Report
- an urgent report filed through ASE
- Where
- over ASE
- Time
- 04:30 UTC
- Height
- at 9,000 ft
- Aircraft
- E75L
- Remarks
- low-level wind shear + 20K 1000-1500 above ground on approach
- BE9L at 24,500 ft, 47 nm south, 7:21 pm PDT (02:21 UTC): moderate turbulence, remarks: ZDVWC-41. At the destination end, 47 nm south of the line.
as filed, and in English
PUB UA /OV PUB250040/TM 0221/FL245/TP BE9L/TB OCNL MOD/RM ZDVWC-41
- Report
- a routine report filed through PUB
- Where
- 40 nm west (250°) of PUB
- Time
- 02:21 UTC
- Height
- at 24,500 ft
- Aircraft
- BE9L
- Turbulence
- occasional moderate
- Remarks
- ZDVWC-41
- UAL737 at 31,000 ft, 5 nm northwest, 8:17 pm PDT (03:17 UTC): no turbulence, wind 358° at 94 knots. At the departure end, 5 nm northwest of the line.
as filed, and in English
ARP UAL737 4410N 12318W 0317 F310 358/094KT TB SMTH IC
- Report
- a routine report filed through ARP
- B737 at 10,000 ft, 31 nm north, 9:25 pm PDT (04:25 UTC): no icing, remarks: during the descent runway 5. 80 nm along the route, 31 nm north of the line.
as filed, and in English
RDM UA /OV RDM/TM 0425/FL100/TP B737/TA UNKN/IC NEG/RM DURD RWY 5
- Report
- a routine report filed through RDM
- Where
- over RDM
- Time
- 04:25 UTC
- Height
- at 10,000 ft
- Aircraft
- B737
- Temperature
- UNKN
- Icing
- none
- Remarks
- during the descent runway 5
- BE20 at 16,000 ft, 23 nm south, 8:28 pm PDT (03:28 UTC): light chop turbulence, light rime icing, -3 °C, remarks: ZDVWC-11. 740 nm along the route, 23 nm south of the line.
as filed, and in English
RIL UA /OV RIL/TM 0328/FL160/TP BE20/TA M03/TB LGT CHOP/IC LGT RIME/RM ZDVWC-11
- Report
- a routine report filed through RIL
- Where
- over RIL
- Time
- 03:28 UTC
- Height
- at 16,000 ft
- Aircraft
- BE20
- Temperature
- −3 °C
- Turbulence
- light chop
- Icing
- light rime
- Remarks
- ZDVWC-11
- UAL2479 at 36,000 ft, 46 nm southwest, 8:11 pm PDT (03:11 UTC): no turbulence, wind 231° at 49 knots. 750 nm along the route, 46 nm southwest of the line.
as filed, and in English
ARP UAL2479 3910N 10753W 0311 F360 231/049KT TB SMTH IC
- Report
- a routine report filed through ARP
- CL35 at 41,000 ft, 29 nm north, 7:40 pm PDT (02:40 UTC): remarks: mtw +/-50FT a 15-knot loss of airspeed ZDVWC-05. 790 nm along the route, 29 nm north of the line.
as filed, and in English
EGE UA /OV RLG/TM 0240/FL410/TP CL35/RM MTW +/-50FT +/-15KT ZDVWC-05
- Report
- a routine report filed through EGE
- Where
- over RLG
- Time
- 02:40 UTC
- Height
- at 41,000 ft
- Aircraft
- CL35
- Remarks
- mtw +/-50FT a 15-knot loss of airspeed ZDVWC-05
- E170 at 22,500 ft, 2 nm northwest, 10:06 pm PDT (05:06 UTC): light to moderate turbulence up to 23,000 ft, remarks: during the descent tbarr star ZDVWC-13. 850 nm along the route, 2 nm northwest of the line.
as filed, and in English
DEN UA /OV DEN216057/TM 0506/FL225/TP E170/TB CONS LGT OCNL MOD BLO 230/RM DURD TBARR STAR. ZDVWC-13
- Report
- a routine report filed through DEN
- Where
- 57 nm southwest (216°) of DEN
- Time
- 05:06 UTC
- Height
- at 22,500 ft
- Aircraft
- E170
- Turbulence
- continuous light occasional moderate below 23,000 ft
- Remarks
- during the descent tbarr star ZDVWC-13
- CL60 at 33,000 ft, 20 nm northeast, 7:35 pm PDT (02:35 UTC): remarks: mtw +/-100FT zdvwc. At the destination end, 20 nm northeast of the line.
as filed, and in English
COS UA /OV BRK080015/TM 0235/FL330/TP CL60/RM MTW +/-100FT ZDVWC
- Report
- a routine report filed through COS
- Where
- 15 nm east (080°) of BRK
- Time
- 02:35 UTC
- Height
- at 33,000 ft
- Aircraft
- CL60
- Remarks
- mtw +/-100FT zdvwc
Winds aloft along the route, and the time en route the forecast for use 02:00–09:00 UTC · at 120 knots true airspeed
The eastbound cruising heights for this course (VFR: odd thousands plus 500 ft; above 18,000 ft the forecast levels), with the wind averaged along the line from the 9 forecast points nearest it (RDM, LKV, BOI, PIH, SLC, RKS, GJT, DEN, PUB). A plus sign is a headwind, a minus sign a tailwind.
| Height | Average wind | Head- or tailwind | Temperature | Ground speed | Time en route | Arrival |
|---|---|---|---|---|---|---|
| 5,500 ft | 360° at 4 kt | −1 kt | 1 °C | 121 kt | 7 h 21 min | 6:35 am MDT (12:35 UTC) |
| 7,500 ft | 220° at 9 kt | −2 kt | 1 °C | 122 kt | 7 h 18 min | 6:32 am MDT (12:32 UTC) |
| 9,500 ft | 230° at 10 kt | −3 kt | -1 °C | 123 kt | 7 h 14 min | 6:28 am MDT (12:28 UTC) |
| 11,500 ft | 240° at 16 kt | −8 kt | -4 °C | 128 kt | 6 h 57 min | 6:11 am MDT (12:11 UTC) |
| 13,500 ft | 230° at 20 kt | −9 kt | -7 °C | 129 kt | 6 h 54 min | 6:08 am MDT (12:08 UTC) |
| 15,500 ft | 230° at 23 kt | −9 kt | -11 °C | 129 kt | 6 h 54 min | 6:08 am MDT (12:08 UTC) |
| 17,500 ft | 230° at 26 kt | −9 kt | -14 °C | 129 kt | 6 h 54 min | 6:08 am MDT (12:08 UTC) |
| 18,000 ft FL180 | 220° at 27 kt | −9 kt | -15 °C | 129 kt | 6 h 54 min | 6:08 am MDT (12:08 UTC) |
| 24,000 ft FL240 | 230° at 31 kt | −11 kt | -25 °C | 131 kt | 6 h 48 min | 6:02 am MDT (12:02 UTC) |
| 30,000 ft FL300 | 230° at 36 kt | −16 kt | -31 °C | 136 kt | 6 h 33 min | 5:47 am MDT (11:47 UTC) |
| 34,000 ft FL340 | 230° at 45 kt | −22 kt | -34 °C | 142 kt | 6 h 16 min | 5:30 am MDT (11:30 UTC) |
| 39,000 ft FL390 | 230° at 46 kt | −21 kt | -42 °C | 141 kt | 6 h 19 min | 5:33 am MDT (11:33 UTC) |
Based on data from the 12th at 00:00 UTC; valid on the 12th at 06:00 UTC for use 02:00 to 09:00 UTC; temperatures above 24,000 ft are below zero. Heights are above sea level; a height is left out when the forecast has no wind for it over most of the line (the ground is higher). Ground speed is the airspeed less the headwind; the time en route is for the straight line and ignores climb, descent and routing around weather.
The forecast points as issued
| Point | From | 3,000 | 6,000 | 9,000 | 12,000 | 18,000 | 24,000 | 30,000 | 34,000 | 39,000 |
|---|---|---|---|---|---|---|---|---|---|---|
| RDM | used from 0 nm out; 66 nm from the line | 040/17 -1° | 030/31 -8° | 010/29 -12° | 010/61 -19° | 360/95 -25° | 360/82 -36° | 360/40 -37° | 310/19 -40° | |
| LKV | used from 150 nm out; 84 nm from the line | 010/8 -8° | 350/13 -11° | 340/21 -21° | 360/60 -26° | 350/37 -32° | 310/26 -35° | 260/25 -39° | ||
| BOI | used from 200 nm out; 93 nm from the line | 300/7 2° | 280/5 -4° | 210/16 -9° | 210/60 -20° | 210/75 -29° | 210/63 -32° | 220/64 -32° | 220/54 -39° | |
| PIH | used from 400 nm out; 84 nm from the line | L/V | 240/13 1° | 240/15 -3° | 210/42 -15° | 200/70 -25° | 220/74 -29° | 220/71 -36° | 220/62 -43° | |
| SLC | used from 450 nm out; 68 nm from the line | 200/5 | 230/8 2° | 220/20 -2° | 210/40 -12° | 190/53 -25° | 210/62 -30° | 220/69 -34° | 220/64 -43° | |
| RKS | used from 600 nm out; 66 nm from the line | 200/41 | 220/44 1° | 220/35 -11° | 220/46 -24° | 210/53 -27° | 220/62 -35° | 230/61 -44° | ||
| GJT | used from 700 nm out; 61 nm from the line | 210/43 7° | 230/45 1° | 220/49 -12° | 220/62 -22° | 220/59 -28° | 230/60 -33° | 220/55 -45° | ||
| DEN | used from 800 nm out; 68 nm from the line | 240/21 14° | 250/44 6° | 220/49 -8° | 220/49 -21° | 230/54 -30° | 240/57 -35° | 240/49 -45° | ||
| PUB | used from 850 nm out; 48 nm from the line | 230/25 13° | 230/32 6° | 220/44 -8° | 230/49 -21° | 240/70 -28° | 240/67 -34° | 240/58 -46° |
The weather now: both ends and the airports along the way public airports with a weather report within 25 nm of the line, one for each stretch
| Airport | Where | Conditions | Wind | Visibility | Ceiling | Elevation | Reported |
|---|---|---|---|---|---|---|---|
| EUG Eugene, OR | departure | VFR Sky: a few clouds at 9,500 feet | from the east (090°) at 3 knots | 10+ mi | none | 373 ft | 9:54 pm PDT (04:54 UTC) |
| BDN Bend, OR | 80 nm out, 22 nm northeast of the line | VFR Sky: overcast at 7,000 feet | from the west (280°) at 3 knots | 10+ mi | 7,000 ft | 3,459 ft | 04:55 UTC |
| BNO Burns, OR | 190 nm out, 21 nm north of the line | VFR | from the north-northwest (340°) at 12 knots, gusting to 24 | 10+ mi | none | 4,148 ft | 04:53 UTC |
| TWF Twin Falls, ID | 390 nm out, 22 nm northeast of the line, tower | VFR Sky: scattered clouds at 4,200 feet, overcast at 5,000 feet | from the west-southwest (250°) at 8 knots | 10+ mi | 5,000 ft | 4,153 ft | 04:53 UTC |
| OGD Ogden, UT | 520 nm out, 11 nm south of the line, tower | VFR Sky: scattered clouds at 3,600 feet, a broken layer at 5,500 feet | from the south-southeast (160°) at 4 knots | 10+ mi | 5,500 ft | 4,472 ft | 04:53 UTC |
| EVW Evanston, WY | 560 nm out, 12 nm northeast of the line | VFR Sky: overcast at 4,200 feet Weather: light rain | from the south (170°) at 8 knots | 10+ mi | 4,200 ft | 7,142 ft | 04:53 UTC |
| VEL Vernal, UT | 650 nm out, 8 nm southwest of the line | VFR Sky: a broken layer at 7,000 feet, overcast at 10,000 feet | from the south-southwest (200°) at 13 knots, gusting to 25 | 10+ mi | 7,000 ft | 5,274 ft | 04:53 UTC |
| EGE Eagle, CO | 780 nm out, 5 nm west of the line, tower | VFR Sky: a few clouds at 6,000 feet, a broken layer at 9,000 feet, overcast at 11,000 feet | from the west (280°) at 10 knots, gusting to 15 | 10+ mi | 9,000 ft | 6,547 ft | 04:56 UTC |
| LXV Leadville, CO | 810 nm out, 11 nm south of the line | VFR Sky: a few clouds at 7,000 feet | from the north (350°) at 4 knots | 10+ mi | none | 9,933 ft | 04:53 UTC |
| COS Colorado Springs, CO | destination | VFR Sky: a broken layer at 18,000 feet | from the south (180°) at 11 knots | 10+ mi | 18,000 ft | 6,187 ft | 10:54 pm MDT (04:54 UTC) |
The highest airport on this list sits at 9,933 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At COS when you get there the forecast at the estimated arrival, 5:30 am MDT (11:30 UTC)
Wind from the south at 12 knots, visibility more than 6 miles, scattered clouds at 6,000 feet, a broken layer at 20,000 feet VFR
The whole forecast for COS
- From Sun 9:00 pm MDT (03:00 UTC): wind from the west-southwest at 12 knots, visibility more than 6 miles, a broken layer at 10,000 feet, a broken layer at 20,000 feet
- From Sun 10:00 pm MDT (04:00 UTC): wind from the south at 12 knots, visibility more than 6 miles, scattered clouds at 6,000 feet, a broken layer at 20,000 feet
- From Mon 6:00 am MDT (12:00 UTC): wind from the north-northeast at 8 knots, visibility more than 6 miles, clear skies
- From Mon 11:00 am MDT (17:00 UTC): wind from the south at 15 knots, gusting to 25, visibility more than 6 miles, scattered clouds at 12,000 feet
The forecast for EUG, the departure
- From Sun 5:00 pm PDT (00:00 UTC): wind from the north at 10 knots, visibility more than 6 miles, scattered clouds at 5,000 feet
- From Sun 8:00 pm PDT (03:00 UTC): wind light and variable, visibility more than 6 miles, clear skies
Temporary flight restrictions on the line or within 25 nm of it
- 6/8784 LAKE GEORGE, CO, Sunday, October 11, 2026 through Tuesday, October 13, 2026 UTC 5 nm from the route, at the destination end · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 13 October · ZDV
Daylight
Sunset at EUG 6:34 pm PDT (01:34 UTC), at COS 6:25 pm MDT (00:25 UTC) (civil twilight ends 6:51 pm MDT (00:51 UTC)). At 120 knots the arrival at COS is before sunrise there (7:04 am MDT (13:04 UTC)).
Each restriction opens the FAA's own page with the exact area, heights and times. Ordinary notices to air missions (closed runways, lights out) are not shown: the FAA's notice search is not open to sites like this one at this time.
Radar and forecast charts for the regions crossed government pictures, the latest each time the page loads
Sources: the Aviation Weather Center's data service (SIGMETs, AIRMETs, graphical AIRMETs, pilot reports, winds and temperatures aloft, observations and terminal forecasts), the National Weather Service radar, the Weather Prediction Center's charts, the FAA's temporary flight restriction list and shapes, and the FAA's airport file for the positions, elevations and magnetic variation. Fetched when the page is viewed and kept a few minutes. Each leg is the straight line between its two airports; airways, terrain and airspace are not considered. The airports in detail: Mahlon Sweet Field, City Of Colorado Springs Municipal.