City Of Colorado Springs Municipal to Mahlon Sweet Field COS → EUG
890 nautical miles (1,024 statute miles) northwest on a straight line, true course 297°, about 289° magnetic at the departure end (variation 8E). At 120 knots that is 7 h 29 min at the quickest height in today's winds (4,500 ft, a 1-knot headwind), arriving about 3:55 am PDT (10:55 UTC), after sunset at the destination. Right now COS is VFR, wind from the southwest (220°) at 11 knots; EUG is VFR, wind from the northwest (320°) at 7 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 W11W: thunderstorms (a convective SIGMET) up to 34,000 ft, moving from the southwest at 40 knots, until 10:55 pm MDT (04:55 UTC). Near the route, at the departure end.
as issued
WSUS33 KKCI 120255 MKCW WST 120255 CONVECTIVE SIGMET 11W VALID UNTIL 0455Z CO NM FROM 20WNW PUB-10ENE CIM-50WNW ABQ-30NNE DVC-20WNW PUB AREA TS MOV FROM 22040KT. TOPS TO FL340.
- SIGMET W12W: thunderstorms (a convective SIGMET) up to 31,000 ft, moving from the southwest at 20 knots, until 10:55 pm MDT (04:55 UTC). Near the route, 470 nm along the route.
as issued
WSUS33 KKCI 120255 MKCW WST 120255 CONVECTIVE SIGMET 12W VALID UNTIL 0455Z NV FROM 40SSE TWF-10W ELY-30SE OAL-30W OAL-70WSW TWF-40SSE TWF AREA TS MOV FROM 24020KT. TOPS TO FL310.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the first 360 nm of the route.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the first 350 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 route from 20 to 290 nm out.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 60 to 90 nm out.
- AIRMET ZULU 2C: moderate icing up to 23,000 ft. Over the route from 180 to 600 nm out.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the route from 230 to 510 nm out.
- AIRMET TANGO 5W: strong surface winds (30 knots or more) (due to sustained surface winds greater than 30 knots). Over the route from 240 to 270 nm out.
- AIRMET TANGO 1W: moderate turbulence above 18,000 ft from 18,000 ft to 39,000 ft. Over the last 190 nm of the route.
- AIRMET ZULU 2C: moderate icing up to 20,000 ft. Over the route from 730 to 810 nm out.
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 COS.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- urgent B407 at 10,000 ft, 3 nm south, 8:13 pm MDT (02:13 UTC): moderate to severe turbulence. At the departure end, 3 nm south of the line.
as filed, and in English
COS UUA /OV 10 W COS/TM 0213/FL100/TP B407/TB MDT-SEV
- Report
- an urgent report filed through COS
- Where
- 10 west cos
- Time
- 02:13 UTC
- Height
- at 10,000 ft
- Aircraft
- B407
- Turbulence
- mdt-sev
- BE9L at 24,500 ft, 47 nm south, 8:21 pm MDT (02:21 UTC): moderate turbulence, remarks: ZDVWC-41. At the departure 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
- B738 at 18,000 ft, 1 nm south, 8:02 pm MDT (02:02 UTC): moderate chop turbulence from 18,000 ft to 25,000 ft, remarks: during the climb ZDVWC-41. At the departure end, 1 nm south of the line.
as filed, and in English
COS UA /OV BRK270030/TM 0202/FL180/TP B738/TB MOD CHOP 180-250/RM DURC ZDVWC-41
- Report
- a routine report filed through COS
- Where
- 30 nm west (270°) of BRK
- Time
- 02:02 UTC
- Height
- at 18,000 ft
- Aircraft
- B738
- Turbulence
- moderate chop from 18,000 ft to 25,000 ft
- Remarks
- during the climb ZDVWC-41
- GLF4 at 25,000 ft, 26 nm north, 8:05 pm MDT (02:05 UTC): moderate turbulence, remarks: during the climb ZDVWC-05. 50 nm along the route, 26 nm north of the line.
as filed, and in English
DEN UA /OV FQF250040/TM 0205/FL250/TP GLF4/TB MOD /RM DURC ZDVWC-05
- Report
- a routine report filed through DEN
- Where
- 40 nm west (250°) of FQF
- Time
- 02:05 UTC
- Height
- at 25,000 ft
- Aircraft
- GLF4
- Turbulence
- moderate
- Remarks
- during the climb ZDVWC-05
- E75L at 28,000 ft, 16 nm north, 7:31 pm MDT (01:31 UTC): moderate turbulence, remarks: ZDVWC-03. 130 nm along the route, 16 nm north of the line.
as filed, and in English
EEO UA /OV EKR085036/TM 0131/FL280/TP E75L/TB MOD/RM ZDVWC-03
- Report
- a routine report filed through EEO
- Where
- 36 nm east (085°) of EKR
- Time
- 01:31 UTC
- Height
- at 28,000 ft
- Aircraft
- E75L
- Turbulence
- moderate
- Remarks
- ZDVWC-03
- CL60 at 33,000 ft, 20 nm northeast, 8:35 pm MDT (02:35 UTC): remarks: mtw +/-100FT zdvwc. At the departure 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
- GLF6 at 40,000 ft, 16 nm north, 6:48 pm MDT (00:48 UTC): light to moderate chop turbulence, remarks: ZDVWC-46. At the departure end, 16 nm north of the line.
as filed, and in English
COS UA /OV COS340020/TM 0048/FL400/TP GLF6/TB LGT-MOD CHOP/RM ZDVWC-46
- Report
- a routine report filed through COS
- Where
- 20 nm north (340°) of COS
- Time
- 00:48 UTC
- Height
- at 40,000 ft
- Aircraft
- GLF6
- Turbulence
- light to moderate chop
- Remarks
- ZDVWC-46
- B737 at 25,000 ft, 2 nm southwest, 6:29 pm MDT (00:29 UTC): light rime icing, 0 °C, remarks: during the climb ZDVWC-29. At the departure end, 2 nm southwest of the line.
as filed, and in English
COS UA /OV BRK242015/TM 0029/FL250/TP B737/SK TOP280/TA 00/IC LGT RIME/RM DURC ZDVWC-29
- Report
- a routine report filed through COS
- Where
- 15 nm southwest (242°) of BRK
- Time
- 00:29 UTC
- Height
- at 25,000 ft
- Aircraft
- B737
- Sky
- TOP280
- Temperature
- 0 °C
- Icing
- light rime
- Remarks
- during the climb ZDVWC-29
- E55P at 38,000 ft, 10 nm north, 7:23 pm MDT (01:23 UTC): light chop turbulence, remarks: ZDVWC-05. At the departure end, 10 nm north of the line.
as filed, and in English
DEN UA /OV FQF200040/TM 0123/FL380/TP E55P/TB LGT CHOP/RM ZDVWC-05
- Report
- a routine report filed through DEN
- Where
- 40 nm south (200°) of FQF
- Time
- 01:23 UTC
- Height
- at 38,000 ft
- Aircraft
- E55P
- Turbulence
- light chop
- Remarks
- ZDVWC-05
- CL35 at 41,000 ft, 29 nm north, 8:40 pm MDT (02:40 UTC): remarks: mtw +/-50FT a 15-knot loss of airspeed ZDVWC-05. 100 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
- B738 at 32,000 ft, 17 nm northeast, 7:42 pm MDT (01:42 UTC): light to moderate turbulence up to 30,000 ft, remarks: during the climb ZDVWC-05. 100 nm along the route, 17 nm northeast of the line.
as filed, and in English
EGE UA /OV RLG160014/TM 0142/FL320/TP B738/TB LGT-MOD BLO 300/RM DURC ZDVWC-05
- Report
- a routine report filed through EGE
- Where
- 14 nm south (160°) of RLG
- Time
- 01:42 UTC
- Height
- at 32,000 ft
- Aircraft
- B738
- Turbulence
- light to moderate below 30,000 ft
- Remarks
- during the climb ZDVWC-05
- UAL2479 at 36,000 ft, 46 nm southwest, 9:11 pm MDT (03:11 UTC): no turbulence, wind 231° at 49 knots. 140 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
- B737 at 16,000 ft, 43 nm southwest, 6:45 pm MDT (00:45 UTC): no turbulence, light rime icing from 13,000 ft to 17,000 ft, 8 °C, remarks: during the climb. 370 nm along the route, 43 nm southwest of the line.
as filed, and in English
SLC UA /OV TCH230020/TM 0045/FL160/TP B737/TA 8/TB NEG/IC LT RIME 130-170/RM DURC
- Report
- a routine report filed through SLC
- Where
- 20 nm southwest (230°) of TCH
- Time
- 00:45 UTC
- Height
- at 16,000 ft
- Aircraft
- B737
- Temperature
- 8 °C
- Turbulence
- none
- Icing
- lt rime from 13,000 ft to 17,000 ft
- Remarks
- during the climb
- PC12 at 14,000 ft, 36 nm north, 8:13 pm MDT (02:13 UTC): light turbulence up to 21,000 ft, light rime icing from 10,000 ft to 14,000 ft, -10 °C. 540 nm along the route, 36 nm north of the line.
as filed, and in English
BOI UA /OV BOI117049/TM 0213/FL140/TP PC12/TA M10/TB CONS LGT 210 BLO/IC LGT RIME 140-100 /ZLC
- Report
- a routine report filed through BOI
- Where
- 49 nm southeast (117°) of BOI
- Time
- 02:13 UTC
- Height
- at 14,000 ft
- Aircraft
- PC12
- Temperature
- −10 °C
- Turbulence
- continuous light at 21,000 ft below
- Icing
- light rime from 14,000 ft to 10,000 ft zlc
5 more routine reports are on the map.
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 westbound cruising heights for this course (VFR: even 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 (PUB, DEN, GJT, RKS, SLC, PIH, BOI, LKV, RDM). A plus sign is a headwind, a minus sign a tailwind.
| Height | Average wind | Head- or tailwind | Temperature | Ground speed | Time en route | Arrival |
|---|---|---|---|---|---|---|
| 4,500 ft | 360° at 4 kt | +1 kt | 1 °C | 119 kt | 7 h 29 min | 3:55 am PDT (10:55 UTC) |
| 6,500 ft | 360° at 4 kt | +1 kt | 0 °C | 119 kt | 7 h 29 min | 3:55 am PDT (10:55 UTC) |
| 8,500 ft | 220° at 9 kt | +2 kt | 0 °C | 118 kt | 7 h 33 min | 3:59 am PDT (10:59 UTC) |
| 10,500 ft | 230° at 13 kt | +6 kt | -2 °C | 114 kt | 7 h 48 min | 4:14 am PDT (11:14 UTC) |
| 12,500 ft | 240° at 18 kt | +9 kt | -5 °C | 111 kt | 8 h 01 min | 4:27 am PDT (11:27 UTC) |
| 14,500 ft | 230° at 22 kt | +9 kt | -9 °C | 111 kt | 8 h 01 min | 4:27 am PDT (11:27 UTC) |
| 16,500 ft | 230° at 25 kt | +9 kt | -12 °C | 111 kt | 8 h 01 min | 4:27 am PDT (11:27 UTC) |
| 18,000 ft FL180 | 220° at 28 kt | +9 kt | -15 °C | 111 kt | 8 h 01 min | 4:27 am PDT (11:27 UTC) |
| 24,000 ft FL240 | 230° at 33 kt | +12 kt | -25 °C | 108 kt | 8 h 14 min | 4:40 am PDT (11:40 UTC) |
| 30,000 ft FL300 | 230° at 38 kt | +16 kt | -31 °C | 104 kt | 8 h 33 min | 4:59 am PDT (11:59 UTC) |
| 34,000 ft FL340 | 230° at 46 kt | +22 kt | -34 °C | 98 kt | 9 h 05 min | 5:31 am PDT (12:31 UTC) |
| 39,000 ft FL390 | 230° at 46 kt | +20 kt | -42 °C | 100 kt | 8 h 54 min | 5:20 am PDT (12:20 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| PUB | used from 0 nm out; 53 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° | ||
| DEN | used from 50 nm out; 74 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° | ||
| GJT | used from 100 nm out; 75 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° | ||
| RKS | used from 200 nm out; 70 nm from the line | 200/41 | 220/44 1° | 220/35 -11° | 220/46 -24° | 210/53 -27° | 220/62 -35° | 230/61 -44° | ||
| SLC | used from 300 nm out; 44 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° | |
| PIH | used from 400 nm out; 76 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° | |
| BOI | used from 500 nm out; 87 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° | |
| LKV | used from 700 nm out; 82 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° | ||
| RDM | used from 750 nm out; 44 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° |
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 |
|---|---|---|---|---|---|---|---|
| COS Colorado Springs, CO | departure | VFR Sky: scattered clouds at 12,000 feet, a broken layer at 16,000 feet, a broken layer at 20,000 feet | from the southwest (220°) at 11 knots | 10+ mi | 16,000 ft | 6,187 ft | 8:54 pm MDT (02:54 UTC) |
| LXV Leadville, CO | 80 nm out, 11 nm south of the line | VFR Sky: a few clouds at 3,600 feet, a few clouds at 4,400 feet | from the south-southeast (160°) at 11 knots, gusting to 20 | 10+ mi | none | 9,933 ft | 02:53 UTC |
| EGE Eagle, CO | 110 nm out, 5 nm west of the line, tower | VFR | from the west (280°) at 5 knots | 10+ mi | none | 6,547 ft | 02:56 UTC |
| VEL Vernal, UT | 240 nm out, 8 nm southwest of the line | VFR | from the south (190°) at 14 knots, gusting to 26 | 10+ mi | none | 5,274 ft | 02:53 UTC |
| EVW Evanston, WY | 330 nm out, 12 nm northeast of the line | VFR Sky: overcast at 4,500 feet Weather: light rain | from the southwest (220°) at 7 knots | 10+ mi | 4,500 ft | 7,142 ft | 03:09 UTC |
| OGD Ogden, UT | 370 nm out, 11 nm south of the line, tower | VFR Sky: overcast at 5,000 feet | from the south-southwest (210°) at 3 knots | 10+ mi | 5,000 ft | 4,472 ft | 02:53 UTC |
| TWF Twin Falls, ID | 500 nm out, 22 nm northeast of the line, tower | VFR Sky: overcast at 4,400 feet | from the west-southwest (240°) at 6 knots | 10+ mi | 4,400 ft | 4,153 ft | 02:53 UTC |
| BNO Burns, OR | 700 nm out, 21 nm north of the line | VFR | from the northwest (320°) at 10 knots, gusting to 22 | 10+ mi | none | 4,148 ft | 02:53 UTC |
| BDN Bend, OR | 810 nm out, 22 nm northeast of the line | VFR Sky: a broken layer at 4,600 feet, a broken layer at 6,000 feet, overcast at 7,000 feet | from the northwest (310°) at 4 knots | 10+ mi | 4,600 ft | 3,459 ft | 03:15 UTC |
| EUG Eugene, OR | destination | VFR Sky: a few clouds at 6,500 feet, scattered clouds at 8,000 feet | from the northwest (320°) at 7 knots | 10+ mi | none | 373 ft | 7:54 pm PDT (02:54 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 EUG when you get there the forecast at the estimated arrival, 3:55 am PDT (10:55 UTC)
Wind light and variable, visibility more than 6 miles, clear skies VFR
The whole forecast for EUG
- 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
The forecast for COS, the departure
- From Sun 8:00 pm MDT (02:00 UTC): wind from the west-southwest at 15 knots, gusting to 25, visibility more than 6 miles, a broken layer at 10,000 feet, a broken layer at 20,000 feet
- At times between Sun 8:00 pm MDT (02:00 UTC) and 10:00 pm MDT (04:00 UTC): wind from the west-southwest at 25 knots, gusting to 35, visibility more than 6 miles, a broken layer at 9,000 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
Temporary flight restrictions on the line or within 25 nm of it
- 6/8770 COLORADO SPRINGS, CO, Saturday, October 10, 2026 through Monday, October 12, 2026 UTC 3 nm from the route, at the departure end · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 12 October · ZDV
- 6/8784 LAKE GEORGE, CO, Sunday, October 11, 2026 through Tuesday, October 13, 2026 UTC 5 nm from the route, at the departure end · a hazard on the ground (fire-fighting, a chemical spill, rescue work) · until 13 October · ZDV
Daylight
Sunset at COS 6:25 pm MDT (00:25 UTC), at EUG 6:34 pm PDT (01:34 UTC) (civil twilight ends 7:03 pm PDT (02:03 UTC)). At 120 knots the arrival at EUG is before sunrise there (7:23 am PDT (14:23 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: City Of Colorado Springs Municipal, Mahlon Sweet Field.