WA➜MT

The Route: Washington to Montana

This route guide provides a general overview for commercial truck drivers traveling from Washington State to Montana. Always consult official sources and updated information before starting your trip. This route utilizes primarily Interstate Highways, balancing efficiency and accessibility.

From most starting points in Washington, you will likely begin by heading East on I-90. I-90 will be your primary corridor for the majority of this journey. Continue eastward on I-90, passing through major cities like Spokane, Washington.

I-90 continues directly into Montana. Major cities along the Montana portion of I-90 include Missoula, Butte, and Bozeman. Your final destination in Montana will dictate whether you remain on I-90 throughout the state or require taking connecting state routes or highways branching off of the Interstate.

Compliance & Permits

Adherence to state and federal regulations is crucial for a successful trip. Be sure your CDL, medical card, and vehicle documentation are current and readily available. Pay particular attention to hours of service (HOS) regulations.

Expect to encounter weigh stations along I-90 in both Washington and Montana. Specific locations can vary, but generally, look for them near state borders and major cities. Common weigh station names include Washington State Patrol Commercial Vehicle Enforcement (CVE) stations and Montana Department of Transportation (MDT) weigh stations. Remember to check pre-pass transponder activity as many weigh stations have bypass options.

One permit that may apply, depending on your load, is an Overweight/Over-Dimensional Permit. Both Washington and Montana have specific size and weight restrictions. If your load exceeds these limits, you will need to obtain the proper permits from each state's Department of Transportation prior to travel. This typically applies to oversized machinery, prefabricated structures, or exceptionally heavy equipment. Check the individual state DOT websites for specific requirements and permit applications.

Risks & Hazards

This route presents several potential hazards, especially during certain seasons.

Winter poses the greatest challenge. The Rocky Mountains, traversed by I-90, are notorious for heavy snowfall, icy conditions, and blizzard conditions. Be prepared with chains, extra blankets, and a winter emergency kit. Check weather forecasts frequently and be prepared to delay travel if conditions are unfavorable. Road closures are common in the winter months.

Spring and Early Summer can bring flooding and mudslides, especially in mountainous areas. Melting snowpack and heavy rainfall can overwhelm drainage systems, leading to road closures and hazardous driving conditions.

Summer brings risks of wildfires. Smoke can significantly reduce visibility, making driving dangerous. Check for fire restrictions and be aware of potential route closures due to wildfires. Heat can also be a factor, potentially impacting tire pressure and increasing the risk of equipment malfunctions. Ensure proper tire inflation and regularly inspect your vehicle.