Live weather · Ice formation scores · GNFAC / WCMAC / FAC avalanche overlay
Updated 5:54 PM UTC
0
No-Go
No-Go — Road closure: Going-to-the-Sun Road — no access
Montana · spring season
🌤️Weather
🚗Roads
⚠️Avy
🥾Trail
📅 Spring Conditions: Transition season. Lower crags climbable May onward. Higher routes hold snow through June. Snowmelt wets rock — wait 48h after rain/snow before rock climbing.
Rock Climbing Areas
Kootenai Creek Canyon
Stevensville, MT · 4,200ft · Granite
🟡 Questionable⚠️ Avy: Low
Recent precipitation — seepage possible on overhangs
Start and end your day early, and most slopes will be safe to travel on. If you travel in steep, exposed terrain, avoid small pockets of wind-drifted snow or slopes with wet, heavy snow deeper than your ankles. Avoid travel under cornices, especially as the day warms.
Start and end your day early, and most slopes will be safe to travel on. If you travel in steep, exposed terrain, avoid small pockets of wind-drifted snow or slopes with wet, heavy snow deeper than your ankles. Avoid travel under cornices, especially as the day warms.
Start and end your day early, and most slopes will be safe to travel on. If you travel in steep, exposed terrain, avoid small pockets of wind-drifted snow or slopes with wet, heavy snow deeper than your ankles. Avoid travel under cornices, especially as the day warms.
Start and end your day early, and most slopes will be safe to travel on. If you travel in steep, exposed terrain, avoid small pockets of wind-drifted snow or slopes with wet, heavy snow deeper than your ankles. Avoid travel under cornices, especially as the day warms.
Start and end your day early, and most slopes will be safe to travel on. If you travel in steep, exposed terrain, avoid small pockets of wind-drifted snow or slopes with wet, heavy snow deeper than your ankles. Avoid travel under cornices, especially as the day warms.
How Ice Formation Score Works:
Ice quality depends on sustained sub-freezing temps. The meter tracks days below 32°F (formation) and sub-20°F (thick pillar building) against recent warm spells. Prime = 2+ weeks hard freeze with no thaw. Out = temps too warm for ice to hold.
Hyalite Canyon
Bozeman, MT · 6,800ft · WI2–WI6+
🔒 Off Season⚠️ Avy: Low
🌧️ 47°F💨 7 mph (11 gusts)🌧️ 98% precip
Classic lines: Mummy II WI4, Chouinard Falls WI4+, Puss in Boots WI4, Canary WI5, Unnamed WI6+, Steep Rhyme WI4
Access: 0.5–4 miles from Hyalite Reservoir trailhead
🛣️ Road: FR-62 plowed to Hyalite Reservoir winter weekends + holidays. Verify plowing schedule at gallatinvalleylandtrust.org before visiting. Unplowed sections: park and ski/skin in.
Start and end your day early, and most slopes will be safe to travel on. If you travel in steep, exposed terrain, avoid small pockets of wind-drifted snow or slopes with wet, heavy snow deeper than your ankles. Avoid travel under cornices, especially as the day warms.
💡 Best ice forms after 2+ weeks of sustained sub-20°F temps. Warm spells (>35°F) degrade pillars rapidly.
Start and end your day early, and most slopes will be safe to travel on. If you travel in steep, exposed terrain, avoid small pockets of wind-drifted snow or slopes with wet, heavy snow deeper than your ankles. Avoid travel under cornices, especially as the day warms.
💡 Higher elevation = more sustained cold. Routes often form earlier (Nov) than valley ice. Wind chill extreme at Beartooth Pass.
Classic lines: Iceberg Lake falls WI3, Grinnell area flows WI2–WI4, Swiftcurrent Valley ice
Access: 0.5–3 miles via maintained winter trails
🛣️ Road: Many Glacier Road typically unplowed after November. Ski-in required (~5 miles from plowed trailhead). Check NPS Glacier for winter closure updates.
Start and end your day early, and most slopes will be safe to travel on. If you travel in steep, exposed terrain, avoid small pockets of wind-drifted snow or slopes with wet, heavy snow deeper than your ankles. Avoid travel under cornices, especially as the day warms.
💡 Continental climate produces reliable cold. Many Glacier receives heavy snowpack — approach terrain avalanche-prone.
⚠️ Safety disclaimer: Conditions change rapidly in Montana. This system provides weather-based estimates only — not a substitute for current local knowledge, guide services, or in-person assessment. Always check GNFAC, WCMAC, and FAC before entering avalanche terrain. Ice climbing and alpine routes involve serious hazards including rockfall, avalanche, and rapidly deteriorating weather. Full disclaimer →