| State: | UT |
| Type: | SR |
| Route: | 90 |
| Alternate Name: | 200 South[1] |
| Section: | 114 |
| Map Custom: | yes |
| Length Mi: | 1.178 |
| Length Round: | 3 |
| Established: | 1975 |
| Direction A: | West |
| Terminus A: | in Brigham City |
| Direction B: | East |
| Terminus B: | in Brigham City |
| Previous Type: | US |
| Previous Route: | 89A |
| Next Type: | US |
| Next Route: | 91 |
State Route 90 (SR-90) is a state highway in the U.S. state of Utah that sits completely within Brigham City in Box Elder County. The route travels from its western terminus at SR-13 to its eastern terminus at the junction of US-89/US-91.[1]
SR-90 was the old routing of US-89/US-91 through the city before it was re-routed to a path bypassing the town.
SR-90 begins in the center of Brigham City and heads east through the east-central portion of the town. After continuing east for six blocks, the highway veers to the southeast to meet with US-89/US-91 at the mouth of Brigham Canyon, where SR-90 traffic is diverted to US-89/US-91 northbound through a flyover ramp.[2]
200 South in Brigham City was added to the state highway system in 1910,[3] and in the 1920s it became part of SR-1 (US-91).[4] A proposed connection from proposed I-15 southwest of Brigham City east and northeast to SR-1 east of Brigham City was numbered State Route 85 in 1960, and in 1962, when SR-1 was moved to I-15, SR-85 was extended along former SR-1 to Idaho. 200 South, which was bypassed by the construction of SR-85 in about 1971,[5] remained as a spur of SR-85 until 1975, when it was renumbered SR-90.[6]