MOUNTAIN LINE DETOURS AND TEMP STOPS FOR BUTLER AND LONE TREE CONSTRUCTION

Transit map showing detours and temporary stops for bus Routes 4 and 14 due to Lone Tree/Butler construction in Flagstaff, with routes and stops marked in different colors.

FLAGSTAFF, AZ (June 4, 2026) –Construction on Butler Avenue has been completed; however, Mountain Line Routes 4 and 14 will continue operating on detour due to ongoing construction activity in the Lone Tree area. Several bus stop closures also remain in effect, and riders should continue using the following temporary stops:

Route 4, Stop 16 (Lone Tree/Franklin northbound): Temporary stop located on the south side of Sawmill Rd., in front of Liz Archuleta County Park.
Route 14, Stop 4 (Lone Tree/Franklin southbound): Temporary stops located on the north side of Sawmill Rd., east of Windsor Ln. near The Grove covered parking, and south on Lone Tree, just north of O’Leary.

Construction on the Butler and Lone Tree project is anticipated to last through November 2026. Click here for a map of the full construction area, including all detours, stop closures, and temporary stops.