Route from West Branch, Iowa to Portland, Oregon

From: "Margriet Ruurs" margriet@margrietruurs.com

I enjoyed your informative site!

I wonder if you can tell me which route an emigrant train would have taken from West Branch, Iowa to Portland, Oregon in 1885?

Would that have been the Union Pacific via Omaha, Denver and Ogden?

Would the journey have taken 7 days?

—Margriet Ruurs, writer, Oregon