Heading east out of Winslow, US 66 split from SR 87 onto an old roadbed, and crossed the Little Colorado River over a bridge that no longer exists. US 66 rejoined SR 87 shortly before the current highway turns north towards I-40 exit 257 and Homolovi State Park. Just north of Winslow, Homolovi State Park preserves over 300 Ancestral Puebloan archaeological sites. Where SR 87 turns north, US 66 continued northeast, merging into I-40. Where I-40 curves southeast, US 66 continued northeast onto Hibbard Road, then made a sharp turn east onto an old roadbed from the Interstate. US 66 proceeded to make a gradual S-curve to the southeast and cross a tributary of the Little Colorado River on another no longer extant bridge. The highway continued straight southeast from the bridge crossing for , then made a sweeping curve south by southeast and crossed I-40.