Air 4 Adventure: Centennial Trail September 20, 2019 11:19 PM Posted: September 20, 2019 11:19 PM Updated: December 10, 2020 4:16 PM by Site staff Copyright 2019 KXLY.com. All rights reserved. This material may not be published, broadcast, rewritten or redistributed without prior permission. From Nine Mile Falls to Higgins Point in Idaho, the Centennial Trail is nearly 65 miles in length. FacebookPinterestTwitterLinkedin