The journey from Snohomish to Boise is approximately 500 miles. You will primarily use I-90 E and I-84 E, which takes about 8 hours. Boise is the capital of Idaho and is known for its outdoor activities, riverfront, and growing downtown area.
Total Distance: 800 km driving, 650 km air distance.
The drive through the mountains can be beautiful but challenging in winter.
Summer for the best weather, or spring for fewer crowds.