Real-time open/closed reports, winter closure schedules, webcams, and Sawtooth mountain pass updates across Lolo Pass (US-12), Galena Summit (ID-75), Lookout Pass (I-90), and Lost Trail Pass. Verified live via Idaho Transportation Department (ITD 511).
Open
High elevation pass on Ponderosa Pine Scenic Byway linking Lowman to Stanley across heavy winter snowpack zones.
Open
Continental Divide mountain pass connecting Leadore, Idaho to Clark Canyon and Dillon, Montana.
Open
Scenic mountain summit on ID-21 between Idaho City and Lowman traversing dense pine forests.
Open
Historic mountain pass connecting Salmon River valley in Idaho with Big Hole Basin in Montana.
Open
High rolling prairie summit on US-95 providing access across the Camas Prairie agricultural plateau.
Open
Continental Divide pass named after Nez Perce Chief Joseph. Major route between Salmon ID and Wisdom MT.
Open
Highest highway pass in Idaho. Overlooks the headwaters of the Salmon River and majestic Sawtooth Range.
Open
National Historic Landmark pass where Meriwether Lewis first crossed the Continental Divide in 1805.
Open
Key highway pass on the Idaho-Montana border adjacent to Lost Trail Powder Mountain ski resort.
Open
Major trans-interstate highway pass on the ID-MT line adjacent to Lookout Pass Ski Area.
Open
Historic 1860 wagon road pass engineered by John Mullan connecting Fort Benton to Fort Walla Walla.
Open
Continental Divide interstate pass connecting Dubois, Idaho with Lima, Montana. Prone to winter ground blizzards.
Open
Key interstate summit on I-90 connecting Coeur d'Alene to Kellogg and the Silver Valley mining region.
Open
Famous multi-lane grade climbing 2,900 vertical feet out of the Salmon River Canyon onto Camas Prairie.
Open
Historic Lewis & Clark pass along US-12 traversing Clearwater National Forest between Kooskia and Missoula.
Get live SMS, Email, or Telegram notifications whenever winter snowstorms, avalanches, or chain requirements affect Idaho highway passes.
Direct verified answers for Idaho pass road conditions, mountain summits, and ITD status updates.
Lolo Pass (elevation 5,233 ft / 1,595 m) on US-12 between Idaho and Montana is OPEN year-round. ITD maintains active snow plowing; winter traction advisories are common.
Galena Summit (elevation 8,701 ft / 2,652 m) on ID-75 connecting Sun Valley to Stanley is OPEN year-round. High alpine highway with active avalanche mitigation in the Sawtooth Range.
Interstate 90 passes over Fourth of July Pass (3,088 ft) and Lookout Pass (4,725 ft) are open year-round with ITD 24/7 priority winter maintenance.
White Bird Hill Summit on US-95 and Targhee Pass on US-20 near West Yellowstone are open year-round with ITD winter maintenance.
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