Utah State Route 109
|Maintained by UDOT|
|Length:||2.96 mi (4.77 km)|
|Existed:||1931 – present|
|West end:||SR-126 in Layton|
|East end:||US-89 in Layton|
The route starts at the intersection of SR-126 (Main Street) and Gentile Street in the historic section of Layton, close to the historic Utah Central Railroad and the current-day Union Pacific Railroad, as well as the Layton Frontrunner station. From here, the route travels east along Gentile Street, almost immediately crossing Interstate 15 via an overpass, after which it passes by the Layton city offices and Layton High School. From this point onwards, the route primarily passes by residential subdivisions, crossing Fort Lane and Fairfield Road, the two primary north–south roads in the area. Shortly after Fairfield, the route splits off from Gentile Street, becoming Oakhills Drive as it continues east-northeast, climbing into the foothills of the Wasatch Mountains, where it ends at the intersection with US-89.
In 1969, the route was moved to the east along the same street (Gentile Street) to its current alignment.
|0.000||0.000||SR-126 (Main Street)||Western terminus|
|Bridge over I-15|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi