2025-12-19T17:00:00-07:00
...ATMOSPHERIC RIVER TO BRING SIGNIFICANT MOUNTAIN SNOW... .A plume of subtropical moisture associated with an atmospheric river will bring significant mountain snow Thursday into Friday. Snow levels will rise above 5,000 feet Thursday night before quickly dropping Friday morning as strong cold front passes. The heaviest snow accumulations will impact higher elevations above 6,000 feet, especially across the Clearwater and Bitterroot Mountains. * WHAT...Snow expected above 6500 feet. There is a likelihood of moderate winter weather impacts. Total snow accumulations between 4 and 7 inches across Gilmore Summit with 12 to 24 inches over mountain areas including Lost Trail Pass. Winds gusting as high as 45 mph. * WHERE...Lemhi Pass, Highway 93 Lost Trail Pass to Gibbonsville, Highway 28 Tendoy to Lone Pine, and Bannock Pass. * WHEN...From 1 PM this afternoon to 5 PM MST Friday. * IMPACTS...For MODERATE winter weather impacts, expect disruptions to normal activities. Hazardous traveling conditions. Use extra caution while driving. Closures and disruptions to infrastructure may occur. The hazardous conditions could impact the Thursday evening and Friday morning commutes, especially over higher passes.
Lost Trail Ski Report
Rate this placeNearby: Lost Trail Powder Mountain
Last Updated: December 18, 2025
Fresh flakes are falling at Lost Trail today, December 18, 2025, as winter tightens its grip on the Bitterroot Mountains. Lost Trail ski resort in Idaho offers a variety of trails suitable for skiers of all skill levels.
Snowfall Totals & Snow Forecast
Hourly Snowfall
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Wind
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Humidity
Summary
A chilly overnight low of 14°F has kept the slopes firm and ready, while a snowpack depth of 33 inches lays a solid foundation for early-season turns. Although the current snowpack sits slightly below average at 85% of normal, snow is in the forecast — with 4.2 inches expected in the next 24 hours and nearly 10 inches over the next three days. By the end of the week, skiers and riders could be carving through 15 new inches of powder.
Conditions on the mountain are shaping up nicely with dense, supportive base layers and fresh snow on the way. The snow water equivalent of 7.8 inches signals decent moisture content in the snowpack, promising great glide on well-groomed trails. There are no major local disruptions or news alerts at this time, so travel routes to the resort remain open and accessible. With new snow stacking up and lower temperatures holding, this is an ideal time for powder hounds and weekend warriors alike to hit Lost Trail’s scenic slopes.
Weather Forecast
Seasonal Comparison
Year over year snow water equivalent
Snow Water Equivalent (SWE) shows how much water the snow holds. This is ideal for year-to-year tracking of real snowfall and water resources. Measurements from Saddle Mtn..
Regional Snowpack Depth
Snow levels measured from Saddle Mtn.
Snowpack depth measures how much snow has accumulated in the area. This is a key indicator of powder quality, trail coverage, and how epic your runs are going to be this season at Lost Trail.
Historical Air Temperature
Temperature fluctuations at Lost Trail
Recent air temperature fluctuations at Lost Trail impact snow quality and stability, from powder to slush.
About the Area
Lost Trail Ski Resort is located in the Bitterroot Mountain Range in Idaho and Montana. The resort is situated on the border of Idaho and Montana and offers stunning views of the surrounding mountains. Some of the prominent mountain aspects at Lost Trail Ski Resort include:
1. The Bitterroot Mountain Range: The Bitterroot Mountains are a subrange of the Rocky Mountains and are known for their rugged beauty and impressive peaks. The range stretches from northern Idaho into Montana and offers a variety of terrain for skiing and snowboarding.
2. Trapper Peak: Trapper Peak is the highest point in the Bitterroot Mountains and is a prominent feature in the landscape surrounding Lost Trail Ski Resort. The peak is a popular destination for hikers and climbers looking for challenging terrain and breathtaking views.
3. Lost Trail Pass: Lost Trail Pass is a mountain pass located near the ski resort and provides access to the Continental Divide. The pass offers stunning views of the surrounding mountains and is a popular spot for backcountry skiing and snowmobiling.
Overall, the mountain ranges and aspects surrounding Lost Trail Ski Resort offer a diverse and beautiful backdrop for visitors to enjoy while skiing and snowboarding.
The best trails are the groomed runs on the front side of the mountain, which provide excellent views of the surrounding landscape. An interesting fact about Lost Trail is that it was originally established as a mining town in the 1800s, and the ski resort was built on the site of an old gold mine. For beginner skiers, the best trail is the Greenhorn run, which is gentle and wide. The best après ski bar at Lost Trail is the Saddle Up Saloon, where visitors can enjoy cold beers and hearty meals in a rustic atmosphere.
Lift Count | 8 Lifts |
Base Elevation | 1951 Meters |
Terrain Park | Yes |
Acreage | 1800 Acres |
Established | 1938 |
Run Count | 50 Trails |
Top Elevation | 2499 Meters |
Lost Trail FAQ
How much snow did Lost Trail receive over the past day?
The ski area received 0" of new snowfall since yesterday.
What's the weather like at Lost Trail today?
Weather today, snow, mainly after 10am. the snow could be heavy at times. high near 31. south wind 11 to 14 mph, with gusts as high as 25 mph. chance of precipitation is 90%. total daytime snow accumulation of 5 to 9 inches possible.
How much new snowfall is forecasted for Lost Trail this week?
Lost Trail is expected to receive up to 15.38" of new snowfall in the next 5 days.
What are ski area conditions in Idaho like right now?
Montana is in for a snowy week, with the highest 5-day snowfall forecasts centered in the southwest and northwest regions. The heaviest accumulation is expected near the Montana-Idaho border and southern Gallatin County. Twin Lakes and Twelvemile Creek near the Lost Trail Pass area are forecasting 33" and 32" respectively, making Lost Trail Powder Mountain the top pick for powder ... Read more