How many miles are from Helena Montana to Kelso Washington?

Answer 1

705 miles taking this route:

1. Take U.S. 12 WEST from Helena to I-90 WEST.
2. Take I-90 WEST across to I-5 SOUTH to TACOMA via I-405 SOUTH (EXIT 10 off I-90 in WASHINGTON) to bypass SEATTLE.
3. Take I-5 SOUTH to KELSO.