Heavy Equipment Shipping from Spokane, WA to Boise, ID

Route Overview: Spokane to Boise

The standard heavy-haul route from Spokane to Boise follows I-90 east from Spokane to Coeur d'Alene, Idaho, then turns south on US-95 through Moscow, Lewiston, Grangeville, New Meadows, and McCall before descending into the Boise Valley. Total distance is approximately 410 miles with an estimated driving time of 9 hours under normal conditions.

Alternate/Detour Route: The Little Salmon and main Salmon River canyon sections of US-95 are prone to rockslides, particularly in late winter and spring. When US-95 is closed, the standard detour routes east via I-90 to Missoula, south on I-15 through Butte and Idaho Falls, then west on I-86/I-84 to Boise — extending the trip to approximately 620 miles. Carriers should monitor IDOT road conditions before departure.

Idaho's Weight Advantage

One of the most significant advantages of this lane is Idaho's generous weight allowance. Idaho permits a gross vehicle weight (GVW) of up to 105,500 lbs on both interstate and non-interstate highways without requiring an escort vehicle — significantly higher than Washington's standard 80,000 lb federal cap. This means many loads that would require superload permits in other states can move on standard oversize permits in Idaho, reducing cost and lead time.

Permit Requirements by State

• Washington (WSDOT): Standard federal limits apply — 80,000 lbs GVW, 8.5 ft width, 13.5 ft height. Oversize permits are issued by WSDOT. Loads over 14 ft wide require pilot cars; loads over 16 ft may require law enforcement escort.
• Idaho (ITD): The Idaho Transportation Department (ITD) manages permits. Standard oversize permit approval typically requires up to 24 working hours. Idaho's 105,500 lb GVW allowance applies on most routes. Loads over 14 ft wide require escorts.
• State-Line Coordination: For loads requiring escorts, carriers must coordinate pilot car handoffs at the Washington/Idaho border near Post Falls. IronHaul manages this coordination in-house.

Seasonal Considerations

This corridor has distinct seasonal challenges that affect routing and scheduling:

• Winter (November–March): Mountain passes on the alternate route (Lookout Pass on I-90) can close or require chains. US-95 through the Salmon River canyon is subject to ice and rockfall. Plan for potential delays and confirm road conditions before dispatch.
• Spring (March–May): Rockslide season on US-95 through the canyon. Idaho enforces spring weight restrictions on secondary roads during thaw. Route on US-95 and interstates to avoid reduced weight limits.
• Harvest Season (August–October): Agricultural harvests (onions, potatoes, sugar beets) in the Treasure Valley and Magic Valley create capacity tightness on southbound lanes. Book early during this period.

Common Equipment Moved on This Lane

• Construction equipment from Spokane-area contractors relocating to Boise-area projects
• Agricultural equipment (combines, tractors, tillage equipment) moving between Washington and Idaho farms
• Mining and quarry equipment from northern Idaho operations
• Auction purchases from Spokane-area sales heading to Boise-area buyers and dealers
• Utility and infrastructure equipment for Idaho's growing construction market

Cost Factors

Heavy equipment transport rates on this corridor typically range from $2.00 to $5.00 per loaded mile. For a standard excavator on an RGN, expect total move costs of $850–$2,100 for this ~410-mile haul. Mountain terrain and seasonal routing complexity can push rates toward the higher end. Pilot car requirements (when applicable) add $1.50–$3.00 per mile per escort vehicle.

Contact IronHaul Logistics for a free quote on your Spokane-to-Boise equipment move. Call (208) 495-2260, email [email protected], or use our online quote form. We're based in Idaho and know this corridor inside and out.