Trip Planning for Lionhead Range

as of 5:00 am
Today2″ | 5-20 W
Dec 8 5″ | 15-40 W
Dec 7 3″ | 25-65 SW
9420′     12/09 at 11:00
W - 16mph
Gusts 21 mph
7750′     12/09 at 11:00
24″ Depth
Primary Problem: Persistent Weak Layer
Bottom Line: Unstable snow is widespread across our advisory area. Weak snow at the ground that fell in October and early November has been overloaded by this week’s new snow. Any slope that held snow before last weekend is suspect. If you ride on or beneath steep slopes today, expect to trigger avalanches. Avoid the hazard by sticking to lower angled slopes today and avoiding crossing runout zones beneath steeper slopes.

Past 5 Days

Sun Dec 3

Mon Dec 4

Thu Dec 7

Fri Dec 8



Relevant Avalanche Activity

Widespread cracking and collapsing
Coordinates: 45.2952, -111.4100
Caught: 0 ; Buried: 0

Cracking and collapsing reported across the advisory area in the Bridger Range, Big Sky area, near West Yellowstone and Island Park, and near Cooke City.

More Avalanche Details
Lionhead Range
Lionhead Ridge
Splitboarder triggered avalanche at lionhead
Lionhead Ridge
Elevation: 9,000
Aspect: NE
Coordinates: 44.7145, -111.3180
Caught: 0 ; Buried: 0

Was splitboarding up near lions head ridge today. Made some bad decisions and kicked off a good slide in a NE facing chute. Was with 2 buddies, 1 of which skied the line 3 weeks ago.  Underneath about a foot of new powder snow there was a firm crust that seemed like it was old  hard windslab in the gut of the chute, and I think a sun crust on the riders left side(East aspect). We had 2 spots where we were planning to re group at, first was a small cubby area right before a slight rollover about 75 ft from the top. I dropped first, made some turns down toward the pulloff, as I pulled in, I triggered a good size slab that propagated maybe 40-50 ft across, at the rollover as I carved into the pulloff.  Pulled  all snow  out of the chute down to the ground. Seemed to have failed on sugary facets on ground/ice crust close to the ground... 

More Avalanche Details

Relevant Photos

Displaying 1 - 5
  • From IG: “Skied in the lions head today on a northeast slope at 8,300 feet. Clear wind loading and reactive cornices, however storm snow was low energy with little movement. 10-14 inches of medium density snow. Whumpfing was noticed on all slopes on the eastern half of the compass.” Photo: O. Desroches

  • From IG: “Pine creek today, some small wind slabs and a full depth wet slide off black mountain”

  • From IG: “Pine creek today (10/21), some small wind slabs and a full depth wet slide off black mountain”

  • From obs. "Was out alpine climbing today and observed the north face of Blackmore had slid already."

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Rendezvous Ski Trail, W. Yellowstone

Snowpit Profiles- Lionhead Range


Select a snowpit on the map to view the profile image

Weather Forecast Lionhead Range

Extended Forecast for

10 Miles WNW West Yellowstone MT

  • Today

    Today: Increasing clouds, with a high near 11. Wind chill values as low as -10. Southwest wind 11 to 20 mph.


    High: 11 °F

  • Tonight

    Tonight: Snow, mainly after 3am. The snow could be heavy at times.  Low around 8. Wind chill values as low as -15. Breezy, with a south southwest wind 22 to 26 mph, with gusts as high as 29 mph.  Chance of precipitation is 80%. New snow accumulation of 2 to 4 inches possible.

    Slight Chance
    Snow then
    Heavy Snow

    Low: 8 °F

  • Sunday

    Sunday: Snow.  High near 16. Wind chill values as low as -10. Breezy, with a southwest wind 18 to 25 mph, with gusts as high as 28 mph.  Chance of precipitation is 100%. New snow accumulation of 3 to 5 inches possible.

    Snow and

    High: 16 °F

  • Sunday

    Sunday Night: Snow.  Low around 15. South southwest wind 7 to 14 mph.  Chance of precipitation is 90%. New snow accumulation of less than one inch possible.


    Low: 15 °F

  • Monday

    Monday: Snow.  High near 22. South southwest wind 3 to 6 mph.  Chance of precipitation is 80%. New snow accumulation of less than one inch possible.


    High: 22 °F

  • Monday

    Monday Night: A 40 percent chance of snow, mainly before 11pm.  Mostly cloudy, with a low around 13. Southwest wind around 6 mph becoming north after midnight.  New snow accumulation of less than a half inch possible.

    Chance Snow

    Low: 13 °F

  • Tuesday

    Tuesday: Mostly sunny, with a high near 23. North northeast wind 5 to 8 mph.

    Mostly Sunny

    High: 23 °F

  • Tuesday

    Tuesday Night: Mostly clear, with a low around 8. North northwest wind around 8 mph becoming east northeast after midnight.

    Mostly Clear

    Low: 8 °F

  • Wednesday

    Wednesday: Sunny, with a high near 23.


    High: 23 °F

The Last Word

Listen to GNFAC Forecaster Dave Zinn on the Hoary Marmot Podcast for some extracurricular avalanche talk (link to episode).

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