Bozeman Yellowstone International to Marfa Municipal BZN → MRF
983 nautical miles (1,132 statute miles) south on a straight line, true course 158°, about 145° magnetic at the departure end (variation 13E). At 120 knots that is 8 h 42 min at the quickest height in today's winds (39,000 ft, a 7-knot headwind), arriving about 3:53 am CDT (08:53 UTC), after sunset at the destination. Right now BZN is low IFR, wind calm; MRF is VFR, wind from the south-southeast (160°) at 9 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: 2 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 W70W: thunderstorms (a convective SIGMET) up to 32,000 ft, moving from the southwest at 40 knots, until 7:55 pm MDT (01:55 UTC). Over the route from 169 to 298 nm out.
as issued
WSUS33 KKCI 112355 MKCW WST 112355 CONVECTIVE SIGMET 70W VALID UNTIL 0155Z MT WY FROM 30SSW MLS-60WNW BFF-40SSE OCS-10S BPI-10S BIL-30SSW MLS AREA TS MOV FROM 22040KT. TOPS TO FL320.
- SIGMET W68W: thunderstorms (a convective SIGMET) up to 36,000 ft, moving from the southwest at 40 knots, until 7:55 pm MDT (01:55 UTC). Over the route from 348 to 705 nm out.
as issued
WSUS33 KKCI 112355 MKCW WST 112355 CONVECTIVE SIGMET 68W VALID UNTIL 0155Z CO NM AZ UT FROM 30W CHE-20NNW TBE-60SE ABQ-40N SJN-30SW MTU-30W CHE AREA TS MOV FROM 23040KT. TOPS TO FL360.
- SIGMET W69W: thunderstorms (a convective SIGMET) up to 34,000 ft, moving from the southwest at 40 knots, until 7:55 pm MDT (01:55 UTC). Near the route, 725 nm along the route.
as issued
WSUS33 KKCI 112355 MKCW WST 112355 CONVECTIVE SIGMET 69W VALID UNTIL 0155Z TX NM AZ FROM 50ENE PGS-60SE ABQ-20ENE ELP-70SSW SSO-50SE BZA-50ENE PGS AREA TS MOV FROM 23040KT. TOPS TO FL340.
- AIRMET SIERRA 4E: low cloud or poor visibility (IFR conditions) (due to ceilings below 1,000 ft, visibility below 3 miles, precipitation, mist). Over the first 189 nm of the route.
- AIRMET TANGO 4W: moderate turbulence above 18,000 ft from 18,000 ft to 36,000 ft. Over the first 576 nm of the route.
- AIRMET SIERRA 1E: mountains obscured by cloud (due to mountains obscured by clouds, precipitation, mist). Over the first 556 nm of the route.
- AIRMET TANGO 4W: moderate turbulence below 18,000 ft up to 18,000 ft. Over the route from 20 to 765 nm out.
- 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 40 to 507 nm out.
- AIRMET ZULU 3C: moderate icing up to 22,000 ft. Over the route from 109 to 228 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 268 to 378 nm out.
- AIRMET TANGO 2W: moderate turbulence above 18,000 ft from 35,000 ft to 45,000 ft. Over the route from 656 to 765 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 BZN.
Pilot reports along the route within 50 nm of the line, last three hours, the serious ones first
- A21N at 33,000 ft, 44 nm northeast, 4:35 pm MDT (22:35 UTC): moderate turbulence, remarks: mountain wave +25-30KTS. 358 nm along the route, 44 nm northeast of the line.
as filed, and in English
HDN UA /OV CHE/TM 2235/FL330/TP A21N/TB MOD/RM MTN WAVE +25-30KTS
- Report
- a routine report filed through HDN
- Where
- over CHE
- Time
- 22:35 UTC
- Height
- at 33,000 ft
- Aircraft
- A21N
- Turbulence
- moderate
- Remarks
- mountain wave +25-30KTS
- C650 at 40,000 ft, 40 nm northeast, 5:48 pm MDT (23:48 UTC): moderate turbulence, remarks: ZDVWC-03. 427 nm along the route, 40 nm northeast of the line.
as filed, and in English
ASE UA /OV DBL/TM 2348/FL400/TP C650/TB MOD /RM ZDVWC-03
- Report
- a routine report filed through ASE
- Where
- over DBL
- Time
- 23:48 UTC
- Height
- at 40,000 ft
- Aircraft
- C650
- Turbulence
- moderate
- Remarks
- ZDVWC-03
- E170 at 10,000 ft, 37 nm west, 5:41 pm MDT (23:41 UTC): moderate turbulence up to 10,000 ft, remarks: during the climb. 427 nm along the route, 37 nm west of the line.
as filed, and in English
GJT UA /OV GJT144009/TM 2341/FL100/TP E170/TB MOD SFC-100/RM DURC
- Report
- a routine report filed through GJT
- Where
- 9 nm southeast (144°) of GJT
- Time
- 23:41 UTC
- Height
- at 10,000 ft
- Aircraft
- E170
- Turbulence
- moderate from the surface to 10,000 ft
- Remarks
- during the climb
- B737 at 36,000 ft, 40 nm northeast, 3:28 pm MDT (21:28 UTC): moderate turbulence, remarks: zdvwc. 427 nm along the route, 40 nm northeast of the line.
as filed, and in English
ASE UA /OV DBL/TM 2128/FL360/TP B737/TB MOD/RM ZDVWC
- Report
- a routine report filed through ASE
- Where
- over DBL
- Time
- 21:28 UTC
- Height
- at 36,000 ft
- Aircraft
- B737
- Turbulence
- moderate
- Remarks
- zdvwc
- C680A at 16,000 ft, 37 nm northeast, 4:59 pm MDT (22:59 UTC): moderate turbulence, scattered clouds above 16,000 ft, remarks: during the descent. 437 nm along the route, 37 nm northeast of the line.
as filed, and in English
ASE UA /OV HAERI/TM 2259/FL160/TP C680A/SK SCT160/TB CONS MOD/RM DURD
- Report
- a routine report filed through ASE
- Where
- haeri
- Time
- 22:59 UTC
- Height
- at 16,000 ft
- Aircraft
- C680A
- Sky
- scattered clouds from 16,000 ft
- Turbulence
- continuous moderate
- Remarks
- during the descent
- C680 at 18,000 ft, 17 nm east, 4:35 pm MDT (22:35 UTC): moderate turbulence, remarks: from 18,000 ft to 10,000 ft. 437 nm along the route, 17 nm east of the line.
as filed, and in English
ASE UA /OV ASE230020/TM 2235/FL180/TP C680/TB MOD/RM 180-100
- Report
- a routine report filed through ASE
- Where
- 20 nm southwest (230°) of ASE
- Time
- 22:35 UTC
- Height
- at 18,000 ft
- Aircraft
- C680
- Turbulence
- moderate
- Remarks
- from 18,000 ft to 10,000 ft
- LJ40 at 19,000 ft, 27 nm northeast, 3:32 pm MDT (21:32 UTC): moderate turbulence. 437 nm along the route, 27 nm northeast of the line.
as filed, and in English
ASE UA /OV ASE240010/TM 2132/FL190/TP LJ40/TB MOD
- Report
- a routine report filed through ASE
- Where
- 10 nm southwest (240°) of ASE
- Time
- 21:32 UTC
- Height
- at 19,000 ft
- Aircraft
- LJ40
- Turbulence
- moderate
- UAL2238 at 38,000 ft, 17 nm east, 5:44 pm MDT (23:44 UTC): moderate turbulence, wind 244° at 64 knots. 497 nm along the route, 17 nm east of the line.
as filed, and in English
ARP UAL2238 3807N 10649W 2344 F380 244/064KT TB CONT MOD TURB IC
- Report
- a routine report filed through ARP
- B738 at 24,000 ft, 30 nm west, 5:13 pm MDT (23:13 UTC): remarks: snow top flight level at 24,000 ft zlc. At the departure end, 30 nm west of the line.
as filed, and in English
BZN UA /OV BZN270030/TM 2313/FL240/TP B738/RM SN TOP FL 240 /ZLC
- Report
- a routine report filed through BZN
- Where
- 30 nm west (270°) of BZN
- Time
- 23:13 UTC
- Height
- at 24,000 ft
- Aircraft
- B738
- Remarks
- snow top flight level at 24,000 ft zlc
- A320 at 6,800 ft, 32 nm west, 4:08 pm MDT (22:08 UTC): scattered clouds above 6,800 ft; overcast above 8,000 ft. 129 nm along the route, 32 nm west of the line.
as filed, and in English
JAC UA /OV JAC/TM 2208/FL068/TP A320/SK SCT068 OVC080
- Report
- a routine report filed through JAC
- Where
- over JAC
- Time
- 22:08 UTC
- Height
- at 6,800 ft
- Aircraft
- A320
- Sky
- SCT068 OVC080
- CRJ7 at 17,000 ft, 40 nm west, 5:03 pm MDT (23:03 UTC): light rime icing, -6 °C. 159 nm along the route, 40 nm west of the line.
as filed, and in English
JAC UA /OV JAC160030/TM 2303/FL170/TP CRJ7/TA M6/IC LGT RIME /ZLC
- Report
- a routine report filed through JAC
- Where
- 30 nm south (160°) of JAC
- Time
- 23:03 UTC
- Height
- at 17,000 ft
- Aircraft
- CRJ7
- Temperature
- −6 °C
- Icing
- light rime zlc
- A320 at 33,000 ft, 16 nm southwest, 4:24 pm MDT (22:24 UTC): light to moderate turbulence. 238 nm along the route, 16 nm southwest of the line.
as filed, and in English
RKS UA /OV OCS306029/TM 2224/FL330/TP A320/TB CONS LGT OCNL MOD /ZLC
- Report
- a routine report filed through RKS
- Where
- 29 nm northwest (306°) of OCS
- Time
- 22:24 UTC
- Height
- at 33,000 ft
- Aircraft
- A320
- Turbulence
- continuous light occasional moderate zlc
- B39M at 28,000 ft, 44 nm northeast, 4:27 pm MDT (22:27 UTC): light turbulence, -30 °C, remarks: ZDVWC-14. 358 nm along the route, 44 nm northeast of the line.
as filed, and in English
HDN UA /OV CHE/TM 2227/FL280/TP B39M/TA M30/TB CONS LGT -OCNL MOD/IC T-LGT RIME/RM ZDVWC-14
- Report
- a routine report filed through HDN
- Where
- over CHE
- Time
- 22:27 UTC
- Height
- at 28,000 ft
- Aircraft
- B39M
- Temperature
- −30 °C
- Turbulence
- continuous light occasional moderate
- Icing
- t-lgt rime
- Remarks
- ZDVWC-14
- B39M at 31,000 ft, 9 nm east, 4:44 pm MDT (22:44 UTC): remarks: mountain wave a 15-knot loss of airspeed zdvwc. 368 nm along the route, 9 nm east of the line.
as filed, and in English
EEO UA /OV EKR/TM 2244/FL310/TP B39M/RM MTN WAVE +/-15KTS ZDVWC
- Report
- a routine report filed through EEO
- Where
- over EKR
- Time
- 22:44 UTC
- Height
- at 31,000 ft
- Aircraft
- B39M
- Remarks
- mountain wave a 15-knot loss of airspeed zdvwc
14 more routine reports are on the map.
Winds aloft along the route, and the time en route the forecast for use 20:00–03:00 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 8 forecast points nearest it (DLN, LND, RKS, GJT, ALS, ABQ, ROW, MRF). A plus sign is a headwind, a minus sign a tailwind.
| Height | Average wind | Head- or tailwind | Temperature | Ground speed | Time en route | Arrival |
|---|---|---|---|---|---|---|
| 7,500 ft | 190° at 26 kt | +23 kt | 9 °C | 97 kt | 10 h 08 min | 5:19 am CDT (10:19 UTC) |
| 9,500 ft | 190° at 28 kt | +23 kt | 10 °C | 97 kt | 10 h 08 min | 5:19 am CDT (10:19 UTC) |
| 11,500 ft | 200° at 33 kt | +24 kt | 5 °C | 96 kt | 10 h 14 min | 5:25 am CDT (10:25 UTC) |
| 13,500 ft | 210° at 37 kt | +25 kt | 1 °C | 95 kt | 10 h 21 min | 5:32 am CDT (10:32 UTC) |
| 15,500 ft | 210° at 40 kt | +25 kt | -3 °C | 95 kt | 10 h 21 min | 5:32 am CDT (10:32 UTC) |
| 17,500 ft | 210° at 43 kt | +25 kt | -7 °C | 95 kt | 10 h 21 min | 5:32 am CDT (10:32 UTC) |
| 18,000 ft FL180 | 210° at 44 kt | +25 kt | -8 °C | 95 kt | 10 h 21 min | 5:32 am CDT (10:32 UTC) |
| 24,000 ft FL240 | 220° at 50 kt | +27 kt | -20 °C | 93 kt | 10 h 34 min | 5:45 am CDT (10:45 UTC) |
| 30,000 ft FL300 | 220° at 58 kt | +29 kt | -30 °C | 91 kt | 10 h 48 min | 5:59 am CDT (10:59 UTC) |
| 34,000 ft FL340 | 240° at 63 kt | +16 kt | -37 °C | 104 kt | 9 h 27 min | 4:38 am CDT (09:38 UTC) |
| 39,000 ft FL390 | 240° at 62 kt | +7 kt | -47 °C | 113 kt | 8 h 42 min | 3:53 am CDT (08:53 UTC) |
Based on data from the 11th at 18:00 UTC; valid on the 12th at 00:00 UTC for use 20:00 to 03:00 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| DLN | used from 0 nm out; 69 nm from the line | 080/10 -3° | 180/8 -3° | 180/23 -14° | 200/58 -22° | 200/80 -36° | 220/85 -41° | 230/81 -45° | ||
| LND | used from 99 nm out; 86 nm from the line | 180/33 10° | 190/50 3° | 210/59 -9° | 200/50 -21° | 190/41 -34° | 230/55 -39° | 240/65 -47° | ||
| RKS | used from 248 nm out; 10 nm from the line | 190/43 | 210/65 3° | 210/57 -9° | 210/56 -21° | 210/47 -33° | 230/63 -37° | 240/77 -46° | ||
| GJT | used from 348 nm out; 56 nm from the line | 210/40 11° | 210/46 3° | 210/61 -10° | 210/68 -22° | 220/57 -29° | 230/59 -36° | 240/66 -46° | ||
| ALS | used from 497 nm out; 55 nm from the line | 210/32 5° | 230/48 -8° | 230/49 -20° | 230/78 -30° | 240/74 -36° | 240/61 -47° | |||
| ABQ | used from 596 nm out; 65 nm from the line | 200/28 13° | 210/28 5° | 210/44 -7° | 230/46 -20° | 230/80 -28° | 240/74 -35° | 240/58 -47° | ||
| ROW | used from 745 nm out; 48 nm from the line | 180/23 | 190/24 15° | 210/27 7° | 230/35 -6° | 240/53 -17° | 240/62 -27° | 250/64 -38° | 260/60 -50° | |
| MRF | used from 894 nm out; 65 nm from the line | 190/16 14° | 210/18 8° | 250/18 -3° | 240/27 -14° | 230/37 -28° | 250/32 -38° | 270/40 -50° |
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 |
|---|---|---|---|---|---|---|---|
| BZN Bozeman, MT | departure | low IFR Sky: scattered clouds at 200 feet, scattered clouds at 700 feet, overcast at 1,100 feet Weather: snow, fog | calm | 0.5 mi | 1,100 ft | 4,473 ft | 5:56 pm MDT (23:56 UTC) |
| WYS West Yellowstone, MT | 60 nm out, 24 nm southwest of the line | low IFR Sky: overcast at 300 feet Weather: light rain, mist | from the north (360°) at 4 knots | 3 mi | 300 ft | 6,649 ft | 23:55 UTC |
| DUB Dubois, WY | 149 nm out, 8 nm northeast of the line | marginal VFR Sky: overcast at 1,200 feet Weather: light drizzle | from the east-southeast (110°) at 14 knots | 10+ mi | 1,200 ft | 7,298 ft | 23:55 UTC |
| RKS Rock Springs, WY | 268 nm out, 8 nm west of the line | VFR Sky: a few clouds at 11,000 feet | from the south (180°) at 12 knots, gusting to 24 | 10+ mi | none | 6,764 ft | 23:54 UTC |
| EEO Meeker, CO | 368 nm out, 11 nm east of the line | VFR Sky: a few clouds at 8,000 feet, a broken layer at 11,000 feet | from the southwest (220°) at 8 knots | 10+ mi | 11,000 ft | 6,415 ft | 23:53 UTC |
| RIL Rifle, CO | 407 nm out, 6 nm northeast of the line | VFR Sky: a broken layer at 7,000 feet, overcast at 8,500 feet Weather: light rain | from the west (270°) at 11 knots, gusting to 22 | 10+ mi | 7,000 ft | 5,536 ft | 00:05 UTC |
| PSO Pagosa Springs, CO | 546 nm out, 11 nm west of the line | VFR Sky: a few clouds at 4,400 feet, overcast at 5,000 feet | from the west-southwest (240°) at 8 knots | 10+ mi | 5,000 ft | 7,663 ft | 23:55 UTC |
| SAF Santa Fe, NM | 656 nm out, 4 nm north of the line, tower | VFR Sky: a broken layer at 7,000 feet, overcast at 8,500 feet Weather: light rain | from the west-southwest (240°) at 16 knots, gusting to 24 | 7 mi | 7,000 ft | 6,348 ft | 23:53 UTC |
| SRR Ruidoso, NM | 785 nm out, 15 nm west of the line | VFR | from the south-southwest (200°) at 11 knots | 10+ mi | none | 6,813 ft | 23:35 UTC |
| ATS Artesia, NM | 834 nm out, 24 nm east of the line | VFR | from the south-southeast (150°) at 14 knots | 10+ mi | none | 3,544 ft | 23:35 UTC |
| VHN Van Horn, TX | 934 nm out, 25 nm west of the line | VFR | from the south (190°) at 13 knots | 10+ mi | none | 3,956 ft | 23:55 UTC |
| MRF Marfa, TX | destination | VFR | from the south-southeast (160°) at 9 knots | 10+ mi | none | 4,848 ft | 7:01 pm CDT (00:01 UTC) |
The highest airport on this list sits at 7,663 ft; the ground between airports is higher still. Check the sectional chart for the terrain and the minimum safe heights along the line.
At MRF when you get there the forecast at the estimated arrival, 3:53 am CDT (08:53 UTC)
MRF has no terminal forecast; use the nearest airport that does.
The forecast for BZN, the departure
- From Sun 6:00 pm MDT (00:00 UTC): wind light and variable, visibility ½ mile, snow, fog, overcast at 300 feet
- At times between Sun 9:00 pm MDT (03:00 UTC) and 12:00 am MDT (06:00 UTC): visibility 2 miles, light snow, mist, scattered clouds at 300 feet, overcast at 1,200 feet
- From Mon 12:00 am MDT (06:00 UTC): wind from the west at 7 knots, visibility 2 miles, light snow, mist, overcast at 800 feet
- At times between Mon 12:00 am MDT (06:00 UTC) and 3:00 am MDT (09:00 UTC): visibility 6 miles, light snow, mist, overcast at 800 feet
- From Mon 3:00 am MDT (09:00 UTC): wind light and variable, visibility more than 6 miles, overcast at 800 feet
- From Mon 12:00 pm MDT (18:00 UTC): wind light and variable, visibility more than 6 miles, scattered clouds at 800 feet, overcast at 2,000 feet
- From Mon 5:00 pm MDT (23:00 UTC): wind light and variable, visibility more than 6 miles, scattered clouds at 1,500 feet, a broken layer at 11,000 feet
Temporary flight restrictions on the line or within 25 nm of it
- 6/8722 ALAMOGORDO, NM, Tuesday, October 13, 2026 Local 2 nm from the route, 755 nm along the route · security · starts tomorrow · ZAB
Daylight
Sunset at BZN 6:44 pm MDT (00:44 UTC), at MRF 7:28 pm CDT (00:28 UTC) (civil twilight ends 7:52 pm CDT (00:52 UTC)). At 120 knots the arrival at MRF is before sunrise there (7:56 am CDT (12:56 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: Bozeman Yellowstone International, Marfa Municipal.