How many miles between Seattle and corvallis?

Answer 1

1. Take I-5 SOUTH from Seattle to OR-34 to Lebanon and CORVALLIS off EXIT 228 in Oregon; turn right off the exit ramp onto OR-34 WEST to CORVALLIS. To bypass PORTLAND, take I-205 SOUTH(EXIT 7 off I-5 in WASHINGTON).
2. Take OR-34 WEST to CORVALLIS.