66 to the west and east of Parks are listed on the NRHP under the name Abandoned Route 66, Parks (1921). Just southeast of Parks, where Old Route 66 dead ends, US 66/US 89 crossed present-day I-40 diagonally to briefly parallel the Santa Fe Railway, before being subsumed into the route of I-40 once again. The old highway left I-40 again briefly along an abandoned graded curve on the south side of the Interstate just west of the Parks Rest Area. East of the rest area, US 66/US 89 split off a third time onto Bellemont Camp Road. The highway continued diagonally southeast through Bellemont, then merged back into I-40. The eastern end of Bellemont Camp Road (which can not be used as a through route by travelers today) is still paved in original concrete. Heading southeast out of Bellemont, US 66/US 89 used the route of I-40 until reaching present-day exit 191. Here, the highway angled southeasterly on I-40 Business into Flagstaff. The former route through Flagstaff is officially named "Historic Route 66". At Milton Road, US 66/US 89 intersected with SR 79 at its northern terminus. By 1941, SR 79 had been redesignated as US 89 Alternate (US 89A). US 89A, as its designation suggests, was an alternative, more direct route for US 89 traffic. US 89A provided a shorter travel distance between Flagstaff and Prescott, via Sedona and the mining town of Jerome. Today, US 89A is known as SR 89A. US 66/US 89 continued north on I-40 Business from the junction with US 89A to underpass with the Santa Fe Railway. On the other side of the underpass, the highway curved right onto Santa Fe Avenue and passed through downtown Flagstaff, including the Santa Fe Railway Depot. Just west of the depot is where current US 180 joins I-40 Business, former US 66 and former US 89. Heading southeast of downtown, paralleling the Santa Fe Railway, US 66/US 89 made two northeasterly curves along with the railroad. At the intersection with Country Club Drive north of I-40 exit 201, current US 180 and I-40 Business split off, heading south to join I-40. This intersection also serves as the current southern terminus of US 89. Just west of this intersection, a later routing of US 66 split off and paralleled the railroad towards Walnut Canyon National Monument and I-40 exit 204 (where the later routing joined the